Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.2
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2019
Apr. 30, 2019
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Sale of stock          
Issuance of common stock in at-the-market offerings, net     $ 466    
Proceeds from sale of common stock       $ 466 $ 0
ATM          
Sale of stock          
Issuance of common stock in at-the-market offerings, net (in shares)     329,656    
Weighted-average price     $ 1.60 $ 1.60  
ATM | Maximum [Member]          
Sale of stock          
Issuance of common stock in at-the-market offerings, net $ 4,000 $ 8,600