Common Stock Warrants - Schedule of Warrants Outstanding (Details) shares in Thousands	Mar. 31, 2020 $ / shares shares
Class of Warrant or Right [Line Items]
Outstanding shares (in shares)	695
Exercisable shares (in shares)	695
Warrants Expiring Feb 2025
Class of Warrant or Right [Line Items]
Outstanding shares (in shares)	695
Exercise price (in dollars per share) | $ / shares	$ 2.28
Exercisable shares (in shares)	695