Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 55	$ 43
Common stock, par value (in dollars per share)	$ 0.04	$ 0.04
Common stock, shares authorized (in shares)	240,000,000	240,000,000
Common stock, shares issued (in shares)	12,167,349	10,103,525
Common stock, shares outstanding (in shares)	12,167,349	10,103,525