Immaterial Restatement of Previously Issued Financial Statements and Reclassification (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 24,462	$ 26,222	$ 25,451	$ 28,074
Accounts receivable, net	10,427		10,174
Inventories	2,963		3,428
Deferred income taxes - current, net	1,060		1,422
Prepaid expenses and other current assets	1,910		738
Total current assets	40,822		41,213
Property and equipment, net	2,779		2,448
Deferred income taxes, net	13,257		12,618
Other long-term assets, net	1,350		1,501
Total assets	58,208		57,780
Current liabilities:
Accounts payable and accrued expenses	6,163		6,320
Deferred revenue	6,834		8,362
Total current liabilities	12,997		14,682
Long-term liabilities:
Deferred revenue	1,518		1,658
Pension liability	3,251		3,189
Other long-term liabilities	1,711		1,694
Total liabilities	$ 19,477		$ 21,223
Commitments and contingencies
Stockholders' equity:
Common stock, par value $.01	$ 92		$ 91
Capital in excess of par value			210,207
Accumulated deficit	(171,491)		(173,595)
Treasury stock, at cost	(255)		(255)
Accumulated other comprehensive income (loss)	12		109
Total stockholders' equity	38,731		36,557
Total liabilities and stockholders' equity	58,208		57,780
Depreciation and amortization	431	420
Provision for excess and obsolete inventories	23	91
Other long-term assets, net	(63)	(110)
All other operating activities, net		(991)
Net cash provided by (used in) operating activities	(2,145)	(590)
Additions to property and equipment	(448)	(282)
All other investing activities, net		301
Net cash Provided by (used in) investing activities	2,267	19
Series A Preferred Stock [Member]
Stockholders' equity:
Shares of preferred stock, par value	0		0
Preferred Class A [Member]
Stockholders' equity:
Shares of preferred stock, par value	$ 0		0
Scenario, Previously Reported [Member]
Current assets:
Cash and cash equivalents			25,451
Accounts receivable, net			10,174
Inventories			3,428
Deferred income taxes - current, net			1,422
Prepaid expenses and other current assets			738
Total current assets			41,213
Property and equipment, net			2,448
Deferred income taxes, net			12,711
Other long-term assets, net			1,501
Total assets			57,873
Current liabilities:
Accounts payable and accrued expenses			6,342
Deferred revenue			8,362
Total current liabilities			14,704
Long-term liabilities:
Deferred revenue			1,658
Pension liability			3,189
Other long-term liabilities			1,716
Total liabilities			$ 21,267
Commitments and contingencies
Stockholders' equity:
Common stock, par value $.01			$ 91
Capital in excess of par value			210,456
Accumulated deficit			(173,795)
Treasury stock, at cost			(255)
Accumulated other comprehensive income (loss)			109
Total stockholders' equity			36,606
Total liabilities and stockholders' equity			57,873
Depreciation and amortization		501
Provision for excess and obsolete inventories		10
Other long-term assets, net		(4)
All other operating activities, net		(991)
Net cash provided by (used in) operating activities		(484)
Additions to property and equipment		(388)
All other investing activities, net		301
Net cash Provided by (used in) investing activities		(87)
Scenario, Previously Reported [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Shares of preferred stock, par value			0
Scenario, Previously Reported [Member] | Preferred Class A [Member]
Stockholders' equity:
Shares of preferred stock, par value			0
Restatement Adjustment [Member]
Current assets:
Total current assets			0
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)
Commitments and contingencies
Stockholders' equity:
Capital in excess of par value			$ (249)
Accumulated deficit			200
Total stockholders' equity			(49)
Total liabilities and stockholders' equity			$ (93)
Depreciation and amortization		(81)
Provision for excess and obsolete inventories		81
Other long-term assets, net		(106)
All other operating activities, net		0
Net cash provided by (used in) operating activities		(106)
Additions to property and equipment		106
All other investing activities, net		0
Net cash Provided by (used in) investing activities		$ 106