Note 7 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Salaries and wages	$ 343	$ 181
Accrued bonus	500	326
Professional fees	362	238
Restructuring severance and benefits (see Note 9)	89	102
Environmental (see Note 8)	57	57
Accrued franchise tax	136	164
Client deposits	197	224
Other	122	56
Total accrued liabilities	$ 1,806	$ 1,348