Nature of Business and Summary of Significant Accounting Policies - Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]
Net Income, Basic EPS	$ 3,122	$ 1,829	$ 7,495	$ 3,952
Net Income, Diluted EPS	$ 3,122	$ 1,829	$ 7,495	$ 3,952
Weighted Average Shares, Basic EPS	18,489,000	18,737,000	18,607,000	18,811,000
Weighted Average Shares, Stock Options	44,000	35,000	47,000	34,000
Weighted Average Shares, Diluted EPS	18,533,000	18,772,000	18,654,000	18,845,000
Net Income Per Share, Basic	$ 0.17	$ 0.10	$ 0.40	$ 0.21
Net Income Per Share, Diluted	$ 0.17	$ 0.10	$ 0.40	$ 0.21