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Net Loss per Share - Basic and Diluted Computation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2019
Numerator:          
Net loss $ (2,083) $ (2,160) $ (4,151) $ (4,398) $ (7,500)
Denominator:          
Denominator for basic and diluted net loss per share — weighted average common stock outstanding 5,947 4,678 5,769 4,374  
Basic and diluted net loss per common share:          
Net loss $ (0.35) $ (0.46) $ (0.72) $ (1.01)