Equity (Tables)

9 Months Ended

Oct. 31, 2019

The following table summarizes the changes in stockholders' equity during the three and nine months ended October 31, 2019:



							Accumulated
				Additional			Other									Total
	Common Stock			Paid-In			Comprehensive			Accumulated			Treasury			Stockholders’
(in thousands)	Shares	Amount		Capital			Loss			Deficit			Stock			Equity
Balance, January 31, 2019	102,173	$	109	$	398,882		$	(1,428	)	$	(301,109	)	$	(11,905	)	$	84,549
Common stock offering, net of issuance costs of $530	7,000	7		146,463			—			—			—			146,470
Exercise of stock options	1,096	1		4,995			—			—			—			4,996
Vested restricted stock units converted to common shares	557	—		—			—			—			—			—
Issuance of restricted stock	4	—		—			—			—			—			—
Issuance of common stock under employee stock purchase plan	170	—		3,283			—			—			—			3,283
Stock-based compensation	—	—		13,472			—			—			—			13,472
Other comprehensive income	—	—		—			349			—			—			349
Net loss	—	—		—			—			(18,959		)	—			(18,959		)
Balance, April 30, 2019	111,000	117		567,095			(1,079		)	(320,068		)	(11,905		)	234,160
Exercise of stock options	830	1		4,136			—			—			—			4,137
Vested restricted stock units converted to common shares	845	1		(1		)	—			—			—			—
Issuance of restricted stock	7	—		—			—			—			—			—
Stock-based compensation	—	—		17,025			—			—			—			17,025
Other comprehensive loss	—	—		—			(892		)	—			—			(892		)
Net loss	—	—		—			—			(29,291		)	—			(29,291		)
Balance, July 31, 2019	112,682	119		588,255			(1,971		)	(349,359		)	(11,905		)	225,139
Exercise of stock options	647	—		3,406			—			—			—			3,406
Vested restricted stock units converted to common shares	820	1		(1		)	—			—			—			—
Issuance of common stock under employee stock purchase plans	222	—		3,344			—			—			—			3,344
Stock-based compensation	—	—		21,601			—			—			—			21,601
Other comprehensive income	—	—		—			1,583			—			—			1,583
Net loss	—	—		—			—			(42,717		)	—			(42,717		)
Balance, October 31, 2019	114,371	$	120	$	616,605		$	(388	)	$	(392,076	)	$	(11,905	)	$	212,356

The following table summarizes the changes in stockholders' equity during the three and nine months ended October 31, 2018:



							Accumulated
				Additional			Other									Total
	Common Stock			Paid-In			Comprehensive			Accumulated			Treasury			Stockholders’
(in thousands)	Shares	Amount		Capital			Loss			Deficit			Stock			Equity
Balance, January 31, 2018	93,977	$	100	$	328,344		$	(1,636	)	$	(233,450	)	$	(11,905	)	$	81,453
Cumulative effect adjustment in connection with the adoption of ASU 2014-09	—	—		—			3			7,178			—			7,181
Exercise of stock options	1,678	2		4,908			—			—			—			4,910
Vested restricted stock units converted to common shares	141	—		—			—			—			—			—
Issuance of restricted stock	4	—		—			—			—			—			—
Issuance of common stock under employee stock purchase plans	438	1		4,090			—			—			—			4,091
Stock-based compensation	—	—		8,066			—			—			—			8,066
Other comprehensive loss	—	—		—			(95		)	—			—			(95		)
Net loss	—	—		—			—			(17,041		)	—			(17,041		)
Balance, April 30, 2018	96,238	103		345,408			(1,728		)	(243,313		)	(11,905		)	88,565
Exercise of stock options	1,833	1		5,231			—			—			—			5,232
Vested restricted stock units converted to common shares	378	1		(1		)	—			—			—			—
Issuance of restricted stock	12	—		—			—			—			—			—
Stock-based compensation	—	—		11,081			—			—			—			11,081
Other comprehensive income	—	—		—			101			—			—			101
Net loss	—	—		—			—			(19,396		)	—			(19,396		)
Balance, July 31, 2018	98,461	105		361,719			(1,627		)	(262,709		)	(11,905		)	85,583
Exercise of stock options	1,489	1		4,941			—			—			—			4,942
Vested restricted stock units converted to common shares	566	1		(1		)	—			—			—			—
Issuance of common stock under employee stock purchase plan	256	—		2,687			—			—			—			2,687
Stock-based compensation	—	—		13,218			—			—			—			13,218
Other comprehensive income	—	—		—			182			—			—			182
Net loss	—	—		—			—			(22,940		)	—			(22,940		)
Balance, October 31, 2018	100,772	$	107	$	382,564		$	(1,445	)	$	(285,649	)	$	(11,905	)	$	83,672