Consolidated Statements of Shareholders' 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, 2012	$ 9,216		$ 45	$ 31,742	$ (22,571)
Balance, Shares at Dec. 31, 2012			45,280,280
Common stock issuance ESPP plan	$ 230			230
Common stock issuance ESPP plan, shares	76,595		76,595
Stock issuance fees and expenses	$ (1,037)			(1,037)
Issuance of stock for stock options	$ 372		$ 1	371
Issuance of stock for stock options, shares	438,998		438,998
Issuance of common stock for cash	$ 9,968		$ 3	9,965
Issuance of common stock for cash, net, shares			3,322,500
Stock compensation expense - warrants	263			263
Stock compensation expense - options	666			666
Net income (loss)	2,033				2,033
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			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		0
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 redeemable convertible preferred stock		$ 28,480
Issuance of Series A redeemable convertible preferred stock, shares		14,666,667
Stock issuance fees and expenses	$ (148)			(148)
Issuance of restricted stock			11,440
Issuance of stock for stock options	$ 714		$ 1	713
Issuance of stock for stock options, shares	492,091		492,091
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
Amortization of preferred stock 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	231,375	$ (21,941)
Balance, Shares at Dec. 31, 2015		14,666,667
Balance, Shares at Dec. 31, 2015			75,820,307
Tax benefit from stock option award activity	118			118
Deemed dividends on preferred stock	(40)			(40)
Deemed dividends on preferred stock	40	$ 40
Amortization of preferred stock beneficial conversion feature	$ (82)			$ (82)