Note 6 - Accrued Liabilities (Current) (Detail) - Accrued Liabilities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2010
Accrued sales commissions and incentives	$ 395	$ 514
Accrued warranty expense	100	159	126
Accrued professional fees	161	153
Accrued employee benefits	296	319
Accrued interest	13	87
Accrued taxes	202	162
Accrued performance-related contingent consideration	351	728
Accrued subcontractor services	286
Accrued other expenses	191	143
Total accrued expenses	$ 1,995	$ 2,265