Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 26,826	$ 28,074
Accounts receivable, net of allowance for doubtful accounts of $54 at March 31, 2015 and $78 at June 30, 2014	12,402	11,355
Inventories	3,946	3,272
Deferred income taxes - current, net	1,354	1,458
Prepaid expenses and other current assets	799	804
Total current assets	45,327	44,963
Property, plant and equipment, net	2,411	2,168
Intangible assets, net	367	476
Deferred income taxes, net	12,927	13,231
Other long-term assets	1,312	1,548
Total assets	62,344	62,386
Current liabilities:
Accounts payable and accrued expenses	7,098	7,591
Deferred revenue	10,049	7,441
Total current liabilities	17,147	15,032
Long-term liabilities:
Deferred revenue	1,929	1,400
Pension liability	2,867	3,566
Other	1,677	1,934
Total liabilities	23,620	21,932
Commitments and contingencies (Note 12)
Stockholders' equity:
Shares of common stock, par value $.01; 14,000,000 authorized; 9,134,043 and 8,996,655 issued and outstanding at March 31, 2015 and June 30, 2014	91	90
Capital in excess of par value	210,353	209,711
Accumulated deficit	(171,715)	(169,001)
Treasury stock, at cost; 37,788 shares	(255)	(255)
Accumulated other comprehensive income	250	(91)
Total stockholders' equity	38,724	40,454
Total liabilities and stockholders' equity	62,344	62,386
Series Preferred Stock [Member]
Stockholders' equity:
Shares of preferred stock	0	0
Preferred Class A [Member]
Stockholders' equity:
Shares of preferred stock	$ 0	$ 0