Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Evaluation of Ability to Maintain Current Level of Operations (Details)

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Basis of Presentation - Evaluation of Ability to Maintain Current Level of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2019
Basis of Presentation                  
Net loss $ (4,907) $ (4,448) $ (5,593) $ (3,450) $ (4,357) $ (4,898) $ (14,948) $ (12,704)  
Cash received (used) in operating activities             (15,720) $ (12,597)  
Cash and cash equivalents 16,730           16,730   $ 29,727
Outstanding borrowings $ 30,000           $ 30,000