Equity Offerings (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Mar. 10, 2020	Mar. 31, 2020
Sale And Issue Of Shares Under Agreement [Line Items]
Commissions earned by Cantor	$ 1,500
2019 ATM Offering
Sale And Issue Of Shares Under Agreement [Line Items]
Total shares of common stock sold (in shares)		6,687,846
Average price per share (in dollars per share)		$ 1.73
Gross proceeds		$ 11,558
Commissions earned by Cantor		346
Net Proceeds		$ 11,212