Stockholders’ Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stockholders’ Equity

9.Stockholders’ Equity

The following tables present changes in stockholders’ equity for the three-month periods ended March 31, 2019 and 2018 (in thousands, except share data):

					Additional		Accumulated Other						Total
	Common				Paid-In		Comprehensive			Accumulated			Stockholders’
	Shares		Amount		Capital		Income (Loss)			Deficit			Equity (Deficit)
Balance at December 31, 2018		45,224,480	$	5	$	478,968	$	(28	)	$	(201,025	)	$	277,920
Retroactive adjustment to beginning accumulated    deficit for adoption of ASC 842		-		-		-		-			(320	)		(320	)
Issuance of common stock through at-the-market    offering, net of issuance costs of $120		223,818		-		3,639		-			-			3,639
Exercise of stock options		30,800		-		360		-			-			360
Equity-based compensation		-		-		4,592		-			-			4,592
Other comprehensive gain		-		-		-		87			-			87
Net loss		-		-		-		-			(21,940	)		(21,940	)
Balance at March 31, 2019		45,479,098	$	5	$	487,559	$	59		$	(223,285	)	$	264,338

						Additional		Accumulated Other					Total
	Common					Paid-In		Comprehensive		Accumulated			Stockholders’
	Shares			Amount		Capital		Income (Loss)		Deficit			Equity (Deficit)
Balance at December 31, 2017		42,384,623		$	4	$	421,706	$	-	$	(121,113	)	$	300,597
Retroactive adjustment to beginning accumulated    deficit for adoption of ASU 2014-09		-			-		-		-		5,431			5,431
Exercise of stock options		709,321			-		6,720		-		-			6,720
Cancellation of restricted stock		(2,022	)		-		-		-		-			-
Equity-based compensation		-			-		4,107		-		-			4,107
Net loss		-			-		-		-		(21,356	)		(21,356	)
Balance at March 31, 2018		43,091,922		$	4	$	432,533	$	-	$	(137,038	)	$	295,499