Loss Per Common Share - Calculation of Net Loss and Weighted Average Common Shares and Common Equivalent Shares Outstanding for Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (2,285)	$ (3,811)	$ (9,282)	$ (3,672)	$ 707	$ (5,853)	$ (13,093)	$ (15,378)	$ (8,818)
Less: Loss allocable to unvested restricted stock				(12)
Loss attributable to common shareholders for diluted earnings per share	$ (2,285)			$ (3,684)				$ (15,378)	$ (8,818)
Weighted average number of common share equivalents:
Common shares used in basic loss per share	13,545,340			13,405,504				13,517,387	13,381,789
Total weighted average common shares and common share equivalents used in diluted loss per share	13,545,340			13,405,504				13,517,387	13,381,789
Loss per share:
Basic	$ (0.17)	$ (0.28)	$ (0.69)	$ (0.27)			$ (0.97)	$ (1.14)	$ (0.66)
Diluted	$ (0.17)	$ (0.28)	$ (0.69)	$ (0.27)			$ (0.97)	$ (1.14)	$ (0.66)