Revenue from Contracts with Customers (Summary of Cumulative Effect of Changes to Unaudited Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jul. 01, 2018	Jun. 30, 2018	Mar. 31, 2018
Current Assets
Cash and cash equivalents	$ 5,429		$ 5,830
Short-term investments	741		877
Receivables:
Billed receivables, net	24,979		31,797
Unbilled receivables, net	6,634	$ 1,864
Other receivables	424		346
Inventories, net	11,905		13,829
Other current assets	2,280		1,327
Total current assets	52,392		54,006
Property and Equipment, Net	6,529		6,613
Goodwill	7,699		7,985
Intangible Assets, Net	3,165		3,820
Long-Term Investments	725		725
Long-Term Deferred Income Tax Asset	658		1,055
Total Assets	71,168		74,204
Current Liabilities
Line of credit and short-term notes payable	17		175
Accounts payable	6,642		7,592
Accrued liabilities and expenses	4,237		4,256
Accrued compensation	1,636		3,155
Current portion of taxes payable	369		526
Income taxes payable	630		768
Reserves for restructuring and other charges			675
Deferred revenue	6,155	6,715	8,691
Total current liabilities	19,686		25,838
Long-Term Taxes Payable	194		450
Long-Term Deferred Income Tax Liability	1,748		1,717
Other Long-Term Liabilities	573		601
Total Liabilities	22,201		28,606
Shareholders' Equity
Preferred stock, no par value, authorized 1,000 shares, issued none	0		0
Common stock	96		96
Accumulated other comprehensive loss	(2,957)		(2,098)
Additional paid-in capital	48,915		48,110
Retained earnings (deficit)	2,913		(510)
Total Shareholders' Equity	48,967		45,598	$ 46,311
Total Liabilities and Shareholders' Equity	71,168		74,204
ASC 606 [Member]
Receivables:
Unbilled receivables, net		1,864
Inventories, net		12,479
Other current assets		1,376
Current Liabilities
Deferred revenue		6,715
Long-Term Deferred Income Tax Liability		2,207
Shareholders' Equity
Retained earnings (deficit)		$ 1,539
ASC 606 Adjustments [Member] | ASC 606 [Member]
Receivables:
Unbilled receivables, net	(6,634)		1,864
Inventories, net	4,134		(1,350)
Other current assets	(251)		49
Total current assets	(2,751)
Total Assets	(2,751)
Current Liabilities
Deferred revenue	2,936		(1,976)
Total current liabilities	2,936
Long-Term Deferred Income Tax Liability	(1,320)		490
Total Liabilities	1,616
Shareholders' Equity
Preferred stock, no par value, authorized 1,000 shares, issued none	0
Accumulated other comprehensive loss	119
Retained earnings (deficit)	(4,486)		$ 2,049
Total Shareholders' Equity	(4,367)
Total Liabilities and Shareholders' Equity	(2,751)
Balances Without Adoption of ASC 606 [Member] | ASC 606 [Member]
Current Assets
Cash and cash equivalents	5,429
Short-term investments	741
Receivables:
Billed receivables, net	24,979
Other receivables	424
Inventories, net	16,039
Other current assets	2,029
Total current assets	49,641
Property and Equipment, Net	6,529
Goodwill	7,699
Intangible Assets, Net	3,165
Long-Term Investments	725
Long-Term Deferred Income Tax Asset	658
Total Assets	68,417
Current Liabilities
Line of credit and short-term notes payable	17
Accounts payable	6,642
Accrued liabilities and expenses	4,237
Accrued compensation	1,636
Current portion of taxes payable	369
Income taxes payable	630
Deferred revenue	9,091
Total current liabilities	22,622
Long-Term Taxes Payable	194
Long-Term Deferred Income Tax Liability	428
Other Long-Term Liabilities	573
Total Liabilities	23,817
Shareholders' Equity
Preferred stock, no par value, authorized 1,000 shares, issued none	0
Common stock	96
Accumulated other comprehensive loss	(2,838)
Additional paid-in capital	48,915
Retained earnings (deficit)	(1,573)
Total Shareholders' Equity	44,600
Total Liabilities and Shareholders' Equity	$ 68,417