Note 5 - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payroll, bonus, and benefits	$ 19	$ 54
Legal and consulting	1,092	902
Stock-based compensation	283	275
Other accrued expenses	271	349
Total accrued liabilities	$ 1,665	$ 1,580