Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands		3 Months Ended	9 Months Ended
	Dec. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating expenses:
Research and development expenses		$ 12,959	$ 11,100	$ 39,743
General and administrative expenses	$ 4,346	3,777	13,958	11,560
Gain on sale of assets	(3,500)		(4,910)
Total operating expenses	846	16,736	20,148	51,303
Loss from operations	(846)	(16,736)	(20,148)	(51,303)
Other income and expenses:
Interest income	140	306	712	863
Interest expense		(472)	(1,527)	(472)
Other (expense) income, net	1	(237)	370	(1,778)
Total other income and expenses	141	(403)	(445)	(1,387)
Net loss from continuing operations before income tax benefit	(705)	(17,139)	(20,593)	(52,690)
Income tax benefit		4,798		4,798
Net loss from continuing operations	(705)	(12,341)	(20,593)	(47,892)
Discontinued operations:
Income from discontinued operations, net of tax		16,330		16,330
Net income (loss)	(705)	3,989	(20,593)	(31,562)
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities		(4)	9	(5)
Other comprehensive income (loss)		(4)	9	(5)
Comprehensive income (loss)	$ (705)	$ 3,985	$ (20,584)	$ (31,567)
Basic and dilutive net income (loss) per common share:
Net loss from continuing operations	$ (0.05)	$ (0.92)	$ (1.54)	$ (3.59)
Net income from discontinued operations, net of tax		1.22		1.22
Net income (loss) per share	$ (0.05)	$ 0.30	$ (1.54)	$ (2.37)
Weighted-average common shares used to compute basic and diluted net loss per common share	13,358	13,343	13,348	13,343
Cash dividend paid per common share	$ 1.4967