Fair Value Measurements (Tables)
|
9 Months Ended |
Oct. 31, 2017 |
|---|
| Fair Value Disclosures [Abstract] |
|
| Fair Value of Financial Assets and Liabilities Measured on Recurring Basis |
The following tables set forth our financial assets and liabilities that were accounted for at fair value on a recurring basis as of October 31, 2017 and January 31, 2017. There were no fair value measurements of our financial assets and liabilities using significant Level 3 inputs for the periods presented:
|
|
|
|
|
|
|
Fair Value at October 31, 2017 Using
|
|
|
|
|
|
|
|
|
Quoted
|
|
|
|
|
|
|
|
|
|
|
|
|
Prices in
|
|
|
Significant
|
|
|
|
|
|
|
|
|
Active
|
|
|
Other
|
|
|
|
|
|
|
|
|
Markets for
|
|
|
Observable
|
|
|
|
|
October 31,
|
|
|
Identical Assets
|
|
|
Inputs
|
|
|
|
|
2017
|
|
|
(Level 1)
|
|
|
(Level 2)
|
|
|
|
|
(Amounts in thousands)
|
|
|
Financial assets:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents (a)
|
|
$
|
3,550
|
|
|
$
|
500
|
|
|
$
|
3,050
|
|
|
Available-for-sale marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Current marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. treasury notes and bonds - conventional
|
|
|
1,993
|
|
|
|
1,993
|
|
|
|
—
|
|
|
U.S. government agency issues
|
|
|
2,997
|
|
|
|
—
|
|
|
|
2,997
|
|
|
Non-current marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. treasury notes and bonds - conventional
|
|
|
1,735
|
|
|
|
1,735
|
|
|
|
—
|
|
|
U.S. government agency issues
|
|
|
993
|
|
|
|
—
|
|
|
|
993
|
|
|
Corporate bonds
|
|
|
1,757
|
|
|
|
—
|
|
|
|
1,757
|
|
|
Total
|
|
$
|
13,025
|
|
|
$
|
4,228
|
|
|
$
|
8,797
|
|
|
|
|
|
|
|
|
Fair Value at January 31, 2017 Using
|
|
|
|
|
|
|
|
|
Quoted
|
|
|
|
|
|
|
|
|
|
|
|
|
Prices in
|
|
|
Significant
|
|
|
|
|
|
|
|
|
Active
|
|
|
Other
|
|
|
|
|
|
|
|
|
Markets for
|
|
|
Observable
|
|
|
|
|
January 31,
|
|
|
Identical Assets
|
|
|
Inputs
|
|
|
|
|
2017
|
|
|
(Level 1)
|
|
|
(Level 2)
|
|
|
|
|
(Amounts in thousands)
|
|
|
Financial assets:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents (a)
|
|
$
|
2,726
|
|
|
$
|
2,726
|
|
|
$
|
—
|
|
|
Available-for-sale marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Current marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. treasury notes and bonds - conventional
|
|
|
4,253
|
|
|
|
4,253
|
|
|
|
—
|
|
|
U.S. government agency issues
|
|
|
1,000
|
|
|
|
—
|
|
|
|
1,000
|
|
|
Non-current marketable securities:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. treasury notes and bonds - conventional
|
|
|
1,997
|
|
|
|
1,997
|
|
|
|
—
|
|
|
U.S. government agency issues
|
|
|
2,994
|
|
|
|
—
|
|
|
|
2,994
|
|
|
Total
|
|
$
|
12,970
|
|
|
$
|
8,976
|
|
|
$
|
3,994
|
|
|
(a)
|
Money market funds and U.S. treasury bills are included in cash and cash equivalents on the accompanying consolidated balance sheets.
|
|
| Summary of Available-for-Sale Securities |
The following is a summary of cash, cash equivalents and available-for-sale securities, including the cost basis, aggregate fair value and gross unrealized gains and losses, for short- and long-term marketable securities portfolio as of October 31, 2017 and January 31, 2017:
|
|
|
Amortized
Cost
|
|
|
Gross
Unrealized
Gains
|
|
|
Gross
Unrealized
Losses
|
|
|
Estimated
Fair Value
|
|
|
|
|
(Amounts in thousands)
|
|
|
October 31, 2017
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash
|
|
$
|
23,605
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
23,605
|
|
|
Cash equivalents
|
|
|
3,549
|
|
|
|
1
|
|
|
|
—
|
|
|
|
3,550
|
|
|
Cash and cash equivalents
|
|
|
27,154
|
|
|
|
1
|
|
|
|
—
|
|
|
|
27,155
|
|
|
U.S. treasury notes and bonds - short-term
|
|
|
2,001
|
|
|
|
—
|
|
|
|
(8
|
)
|
|
|
1,993
|
|
|
U.S. treasury notes and bonds - long-term
|
|
|
1,740
|
|
|
|
—
|
|
|
|
(5
|
)
|
|
|
1,735
|
|
|
U.S. government agency issues - short-term
|
|
|
2,982
|
|
|
|
17
|
|
|
|
(2
|
)
|
|
|
2,997
|
|
|
U.S. government agency issues - long-term
|
|
|
1,003
|
|
|
|
—
|
|
|
|
(10
|
)
|
|
|
993
|
|
|
Corporate bonds - long-term
|
|
|
1,761
|
|
|
|
—
|
|
|
|
(4
|
)
|
|
|
1,757
|
|
|
Total cash, cash equivalents and marketable securities
|
|
$
|
36,641
|
|
|
$
|
18
|
|
|
$
|
(29
|
)
|
|
$
|
36,630
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
January 31, 2017
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash
|
|
$
|
25,576
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
25,576
|
|
|
Cash equivalents
|
|
|
2,726
|
|
|
|
—
|
|
|
|
—
|
|
|
|
2,726
|
|
|
Cash and cash equivalents
|
|
|
28,302
|
|
|
|
—
|
|
|
|
—
|
|
|
|
28,302
|
|
|
U.S. treasury notes and bonds - short-term
|
|
|
4,248
|
|
|
|
5
|
|
|
|
—
|
|
|
|
4,253
|
|
|
U.S. treasury notes and bonds - long-term
|
|
|
2,003
|
|
|
|
—
|
|
|
|
(6
|
)
|
|
|
1,997
|
|
|
U.S. government agency issues - short-term
|
|
|
991
|
|
|
|
9
|
|
|
|
—
|
|
|
|
1,000
|
|
|
U.S. government agency issues - long-term
|
|
|
2,996
|
|
|
|
—
|
|
|
|
(2
|
)
|
|
|
2,994
|
|
|
Total cash, cash equivalents and marketable securities
|
|
$
|
38,540
|
|
|
$
|
14
|
|
|
$
|
(8
|
)
|
|
$
|
38,546
|
|
|
| Schedule of Contractual Maturities Available-for-Sale Investments |
Contractual maturities of available-for-sale investments as of October 31, 2017 are as follows (amounts in thousands):
|
|
|
Estimated
|
|
|
|
|
Fair Value
|
|
|
Maturity of one year or less
|
|
$
|
4,990
|
|
|
Maturity between one and five years
|
|
|
4,485
|
|
|
Total
|
|
$
|
9,475
|
|
|