Note 5 - Other Accrued Liabilities - Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued warranty	$ 236	$ 187
Accrued deferred rent	37	42
Other accrued liabilities	359	467
Accrued Service Contracts [Member]
Accrued outside commissions	28	37
Accrued Contingent Legal Fees [Member]
Accrued outside commissions	25
Accrued Audit [Member]
Accrued outside commissions		149
Other Accrued Liabilities [Member]
Other accrued liabilities	$ 33	$ 52