Stockholders' Equity (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Nov. 27, 2017
Class of Stock [Line Items]
Issuance of shares related to restricted stock (in shares)	200,000	200,000
Stock repurchase program authorized amount				$ 5,000,000
Stock repurchase program shares repurchased (in shares)	61,000	106,000
Shares repurchased amount	$ 200,000	$ 500,000	$ 0
Remaining authorized repurchase amount	$ 4,500,000	$ 4,500,000
Common Stock
Class of Stock [Line Items]
Issuance of shares related to common stock (in shares)	14,000	14,000
Shares canceled or surrendered as payment of tax withholding (in shares)	17,000	23,000