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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Schedule of Stockholders Equity


					Additional
		Common			Paid-In			Accumulated
		Stock			Capital			Deficit			Total
			(In thousands)
Balance January 1, 2019		$	490		$	549,479		$	(650,125)		$	(100,156)
Exercise of stock options			—			108			—			108
Stock-based compensation expense			—			3,374			—			3,374
Net loss			—			—			(24,345)			(24,345)
Balance March 31, 2019			490			552,961			(674,470)			(121,019)
Exercise of stock options			2			1,598			—			1,600
Stock-based compensation expense			—			3,598			—			3,598
Net loss			—			—			(14,453)			(14,453)
Balance June 30, 2019			492			558,157			(688,923)			(130,274)
Exercise of stock options			3			3,323			—			3,326
Stock-based compensation expense			—			3,496			—			3,496
Net loss			—			—			(16,463)			(16,463)
Balance September 30, 2019		$	495		$	564,976		$	(705,386)		$	(139,915)


					Additional
		Common			Paid-In			Accumulated
		Stock			Capital			Deficit			Total
			(In thousands)
Balance January 1, 2018		$	482		$	520,072		$	(523,368)		$	(2,814)
Exercise of stock options			1			686			—			687
Stock-based compensation expense			—			2,966			—			2,966
Net loss			—			—			(30,054)			(30,054)
Balance March 31, 2018			483			523,724			(553,422)			(29,215)
Warrants issued			—			1,424			—			1,424
Exercise of stock options			2			2,188			—			2,190
Stock-based compensation expense			—			3,000			—			3,000
Net loss			—			—			(33,697)			(33,697)
Balance June 30, 2018			485			530,336			(587,119)			(56,298)
Exercise of stock options			5			3,839			—			3,844
Stock-based compensation expense			—			2,929			—			2,929
Net loss			—			—			(39,472)			(39,472)
Balance September 30, 2018		$	490		$	537,104		$	(626,591)		$	(88,997)