Note 3 - Balance Sheet Components (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Unbilled Receivables, Current	$ 15,400,000		$ 15,400,000		$ 11,500,000
Unbilled Receivables, Not Billable, Amount Expected to be Collected after Next Twelve Months	8,000,000		8,000,000		100,000
Deferred Pre-contract Costs	700,000		700,000		0
Depreciation, Depletion and Amortization, Nonproduction	900,000	$ 600,000	1,600,000	$ 1,200,000
Goodwill	215,000		215,000		215,000
Finite-Lived Intangible Assets, Net	4,603,000		$ 4,603,000		$ 5,028,000
Finite-Lived Intangible Assets, Remaining Amortization Period			6 years 302 days
Amortization of Intangible Assets	$ 200,000	$ 0	$ 425,000	$ 0