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Note 3 - Balance Sheet Components | 3 Months Ended
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Mar. 31, 2015
Disclosure Text Block Supplement [Abstract] |
Supplemental Balance Sheet Disclosures [Text Block] | 3. BALANCE SHEET COMPONENTS Accounts receivable include amounts that are unbilled at the end of the period. Unbilled accounts receivable are determined on an individual contract basis and were $9.2 million and $9.7 million as of March 31, 2015, and December 31, 2014, respectively. Property and equipment consists of (in thousands):
|  | March 31, 201 5 |  |  | December 31, 201 4 |
Property and equipment, net: |  |  |  |  |  |  |  |
Computer equipment |  | $ | 8,678 |  |  | $ | 9,817 |
Software |  |  | 1,898 |  |  |  | 3,369 |
Furniture, fixtures and equipment |  |  | 745 |  |  |  | 756 |
Leasehold improvements |  |  | 1,139 |  |  |  | 1,127 |
Test equipment |  |  | 6,677 |  |  |  | 6,401 |
Construction-in-progress |  |  | 3,287 |  |  |  | 2,405 |
|  |  | 22,424 |  |  |  | 23,875 |
Less: accumulated depreciation |  |  | (12,529 | ) |  |  | (15,043 | )
Total |  | $ | 9,895 |  |  | $ | 8,832 |
Depreciation and amortization expense was $0.6 million and $0.5 million for the three months ended March 31, 2015 and 2014, respectively.

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