Note 5 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payroll, bonus, and benefits	$ 317	$ 19
Legal and consulting	167	1,092
Stock-based compensation	171	283
Estimated Litigation Liability, Current	3,000
Other accrued expenses	298	271
Total accrued liabilities	$ 3,953	$ 1,665