Nature of Business and Summary of Significant Accounting Policies - Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]
Net Income, Basic EPS	$ 2,869	$ 1,233	$ 4,373	$ 2,123
Weighted Average Shares, Basic EPS	18,603,000	18,849,000	18,665,000	18,848,000
Weighted Average Shares, Stock Options	46,000	34,000	48,000	33,000
Net Income, Diluted EPS	$ 2,869	$ 1,233	$ 4,373	$ 2,123
Weighted Average Shares, Diluted EPS	18,649,000	18,883,000	18,713,000	18,881,000
Net Income Per Share, Basic	$ 0.15	$ 0.07	$ 0.23	$ 0.11
Net Income Per Share, Diluted	$ 0.15	$ 0.07	$ 0.23	$ 0.11