Condensed Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts on trade accounts receivable (in dollars)	$ 60	$ 87
Debt discount on loans payable, current	37	0
Debt discount on loans payable, noncurrent	0	65
Debt discount on related party loans payable, noncurrent	$ 20	$ 156
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	5,488,568	5,148,568
Common stock, shares outstanding	5,463,568	5,123,568
Treasury stock, shares	25,000	25,000