Stock-Based Compensation (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Workers Compensation Discount [Abstract]

Summary of share-based compensation activity

Common stock option and restricted stock award activity under the Plan was as follows:

			Options and RSAs Outstanding
	Shares Available for Grant		Number of Shares			Weighted Average Exercise Price Per Share
Balance at December 31, 2015		71,431		369,887		$	4.64
Options forfeited		123,098		(123,098	)	$	3.10
Options expired		1,196		(1,196	)	$	13.22
Balance at March 31, 2016		195,725		245,593		$	5.36
Total vested and expected to vest shares (options)				245,593		$	5.36
Total vested shares (options)				75,385		$	10.47

Common stock option and restricted stock award activity under the Plan was as follows:

				Options and RSAs Outstanding
	Shares Available for Grant			Number of Shares			Weighted Average Exercise Price Per Share
Balance at December 31, 2013		128,665			161,185		$	22.70
Authorized		70,695			—		$	—
Options granted		(110,920	)		110,920		$	28.00
Options assumed in merger		—			1,500		$	143.00
Restricted Stock granted		(19,487	)		19,487		$	14.50
Restricted Stock vested		—			(51,300	)	$	19.60
Balance at December 31, 2014		68,953			241,792		$	25.90
Authorized		170,000			—		$	—
Options granted		(530,813	)		530,813		$	5.65
Options forfeited		69,870			(69,870	)	$	10.59
Options expired		12,148			(12,148	)	$	24.72
Options canceled		320,700			(320,700	)	$	12.99
Restricted Stock granted		(39,427	)		39,427		$	3.86
Restricted Stock vested		—			(39,427	)	$	3.86
Balance at December 31, 2015		71,431			369,887		$	4.64
Total vested and expected to vest shares (options)					369,887		$	4.64
Total vested shares (options)					51,555		$	14.12

Outstanding options

The following table summarizes information with respect to stock options outstanding at March 31, 2016:

Options Outstanding								Options Vested
Exercise Price Per Share		Shares Outstanding		Weighted- Average Remaining Contractual Life (Years)		Weighted- Average Exercise Price		Shares Exercisable		Weighted- Average Exercise Price Per Share
$	3.10		216,849		9.36	$	3.10		46,641	$	3.10
$	5.60		2,500		1.08	$	5.60		2,500	$	5.60
$	11.40		17,674		1.08	$	11.40		17,674	$	11.40
$	30.40		7,070		1.08	$	30.40		7,070	$	30.40
$	143.00		1,500		0.21	$	143.00		1,500	$	143.00
			245,593		8.39	$	5.36		75,385	$	10.47

The following table summarizes information with respect to stock options outstanding at December 31, 2015:

Options Outstanding								Options Vested
Exercise Price Per Share		Shares Outstanding		Weighted- Average Remaining Contractual Life (Years)		Weighted- Average Exercise Price		Shares Exercisable		Weighted- Average Exercise Price Per Share
$	3.10		339,946		9.80	$	3.10		21,614	$	3.10
$	5.60		2,500		1.33	$	5.60		2,500	$	5.60
$	6.90		625		0.01	$	6.90		625	$	6.90
$	11.40		17,804		1.32	$	11.40		17,804	$	11.40
$	22.70		442		0.01	$	22.70		442	$	22.70
$	30.40		7,070		1.33	$	30.40		7,070	$	30.40
$	143.00		1,500		0.45	$	143.00		1,500	$	143.00
			369,887		9.10	$	4.64		51,555	$	14.12

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of employee stock options granted was estimated using the following weighted-average assumptions for the three months ended March 31, 2016 and 2015:

	2016		2015
Expected volatility		n/a		64.00	%
Risk free rate		n/a		1.48	%
Dividend yield		n/a		0.00	%
Expected term (in years)		n/a		6.06

The fair value of employee stock options granted was estimated using the following weighted-average assumptions for the twelve months ended December 31:

	2015			2014
Expected volatility		67	%		75	%
Risk free rate		1.41	%		1.77	%
Dividend yield		0	%		0	%
Expected term (in years)		5.57			5.78

Schedule Of Stock Based Compensation Of Employees And Non Employees

Stock-based compensation for employees and non-employees related to options and RSAs recognized:

	For the three months ended March 31, 2016		For the three months ended March 31, 2015
General and administrative	$	130,358	$	472,274

Stock-based compensation for employees and non-employees related to options and RSAs recognized:

	For the twelve months ended December 31, 2015		For the twelve months ended December 31, 2014
General and administrative	$	1,147,374	$	2,873,396