Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity - USD ($) $ in Thousands	Total	Series A Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2013	$ 21,711		$ 49	$ 42,200	$ (20,538)
Balance, Shares at Dec. 31, 2013			49,118,373
Common stock issuance ESPP plan	$ 353			353
Common stock issuance ESPP plan, shares	90,285		90,285
Stock issuance fees and expenses	$ (2,776)			(2,776)
Issuance of stock for warrants	456		$ 1	455
Issuance of stock for warrants, shares			458,333
Issuance of restricted stock, shares			138,500
Issuance of stock for stock options	$ 1,807		$ 2	1,805
Issuance of stock for stock options, shares	2,387,327		2,387,327
Issuance of common stock for cash	$ 37,030		$ 8	37,022
Issuance of common stock for cash, net, shares			8,050,000
Stock compensation expense - warrants	51			51
Stock compensation expense - options and restricted stock	641			641
Net income (loss)	1,132				1,132
Balance at Dec. 31, 2014	60,405		$ 60	79,751	(19,406)
Balance, Shares at Dec. 31, 2014			60,242,818
Common stock issuance ESPP plan	$ 369			369
Common stock issuance ESPP plan, shares	73,958		73,958
Issuance of Series A Preferred Stock		$ 28,480
Issuance of Series A Preferred Stock, shares		14,666,667
Stock issuance fees and expenses	$ (148)			(148)
Issuance of restricted stock, shares			11,440
Issuance of stock for stock options	$ 714		$ 1	713
Issuance of stock for stock options, shares	492,091		492,091
Tax benefit from stock option award activity	$ 118			118
Issuance of common stock to fund acquisition	102,510		$ 15	102,495
Issuance of common stock to fund acquisition, shares			15,000,000
Beneficial conversion feature	44,720			44,720
Deemed dividends on preferred stock	40	$ 40
Deemed dividends on preferred stock	(40)				(40)
Amortization of preferred stock beneficial conversion feature	82	82
Amortization of beneficial conversion feature	(82)				(82)
Stock compensation expense - warrants	590			590
Stock compensation expense - options and restricted stock	2,889			2,889
Net income (loss)	(2,535)				(2,535)
Balance at Dec. 31, 2015		$ 28,602
Balance at Dec. 31, 2015	$ 209,510		$ 76	231,497	(22,063)
Balance, Shares at Dec. 31, 2015	14,666,667	14,666,667
Balance, Shares at Dec. 31, 2015			75,820,307
Common stock issuance ESPP plan	$ 736			736
Common stock issuance ESPP plan, shares	98,672		98,672
Redemption of Series A Preferred Stock		$ (55,000)
Redemption of Series A Preferred Stock, Shares		(8,066,667)
Stock issuance fees and expenses	$ (267)			(267)
Issuance of stock for warrants, shares			165,375
Issuance of restricted stock, shares			43,332
Issuance of stock for stock options	$ 3,299		$ 3	3,296
Issuance of stock for stock options, shares	2,483,519		2,443,472
Beneficial conversion feature reversal		$ 24,596
Beneficial conversion feature reversal	$ (24,596)	(24,596)		(24,596)
Deemed dividends on preferred stock	18,011	18,011
Deemed dividends on preferred stock	(18,011)				(18,011)
Amortization of preferred stock beneficial conversion feature	6,663	6,663
Amortization of beneficial conversion feature	(6,663)				(6,663)
Stock compensation expense - warrants	460			460
Stock compensation expense - options and restricted stock	4,978			4,978
Net income (loss)	(5,723)				(5,723)
Balance at Dec. 31, 2016		$ 22,873
Balance at Dec. 31, 2016	$ 163,723		$ 79	$ 216,104	$ (52,460)
Balance, Shares at Dec. 31, 2016	6,600,000	6,600,000
Balance, Shares at Dec. 31, 2016			78,571,158