Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net (loss) income attributable to common stockholders—basic	$ (977)	$ 1,615
Net (loss) income attributable to nonvested restricted stockholders	(1)	3
Net (loss) income	$ (978)	$ 1,618
Weighted average common shares outstanding - basic (in shares)	16,699,822	16,562,984
Shares issuable under stock options (in shares)	0	121,335
Weighted average common shares outstanding—diluted (in shares)	16,699,822	16,684,319
Net income (loss) per common share - basic (in US$ per share)	$ (0.06)	$ 0.10
Net income (loss) per common share - diluted (in US$ per share)	$ (0.06)	$ 0.10