Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 2,140	$ 2,135
Preferred stock, par value	$ 0.000001	$ 0.000001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.000001	$ 0.000001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	13,172,179	1,514,899
Common Stock, shares outstanding	13,172,179	1,514,899