Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - Calculation of basic and diluted net income (loss) per share - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - Calculation of basic and diluted net income (loss) per share [Line Items]
Net income (loss) attributable to common stockholders – basic calculation	$ 1,975	$ (3,506)
Interest charges applicable to convertible promissory notes	295
preferred dividend	(28)
Net income (loss) used for net income (loss) per share – diluted calculation	$ 2,581	$ (3,506)
Shares used to compute net income (loss) per share – basic	3,656,360	135,658
Potential common shares from exercise of options	25,550
Shares issuable upon conversion of convertible promissory notes, related party	750,924
Shares used to compute net income (loss) per share – diluted	5,299,751	135,658
Net income (loss) per share – basic	$ 0.54	$ (25.84)
Net income (loss) per share – diluted	$ 0.49	$ (25.84)
Series A Preferred Stock [Member]
Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - Calculation of basic and diluted net income (loss) per share [Line Items]
preferred dividend	$ 339
Shares issuable upon conversion of Series B and C convertible preferred stock and accrued dividends	866,917