Immaterial Restatement of Previously Issued Financial Statements and Reclassification (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Current assets:
Deferred income taxes, net	$ 13,354	$ 12,618
Total assets	57,100	57,780
Current liabilities:
Accounts payable and accrued expenses	6,681	6,320
Total current liabilities	13,177	14,682
Long-term liabilities:
Other long-term liabilities	1,762	1,694
Total liabilities	19,572	21,223
Stockholders' equity:
Capital in excess of par value		210,207
Accumulated deficit	(172,928)	(173,595)
Total stockholders' equity	37,528	36,557
Total liabilities and stockholders' equity	$ 57,100	57,780
Scenario, Previously Reported [Member]
Current assets:
Deferred income taxes, net		12,711
Total assets		57,873
Current liabilities:
Accounts payable and accrued expenses		6,342
Total current liabilities		14,704
Long-term liabilities:
Other long-term liabilities		1,716
Total liabilities		21,267
Stockholders' equity:
Capital in excess of par value		210,456
Accumulated deficit		(173,795)
Total stockholders' equity		36,606
Total liabilities and stockholders' equity		57,873
Restatement Adjustment [Member]
Current assets:
Deferred income taxes, net		(93)
Total assets		(93)
Current liabilities:
Accounts payable and accrued expenses		(22)
Total current liabilities		(22)
Long-term liabilities:
Other long-term liabilities		(22)
Total liabilities		(44)
Stockholders' equity:
Capital in excess of par value		(249)
Accumulated deficit		200
Total stockholders' equity		(49)
Total liabilities and stockholders' equity		$ (93)