Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014
Net Income from Discontinued Operations on the Condensed Consolidated Statements of Operations
Income from discontinued operations, net of income taxes	$ 348	$ 761
PPT
Net Income from Discontinued Operations on the Condensed Consolidated Statements of Operations
Revenue	8,582	12,160
Income from operations	588	1,312
Other expense	0	0
Income before income taxes	588	1,312
Income tax provision	240	551
Income from discontinued operations, net of income taxes	348	761
Assets and Liabilities Relating to PPT
Accounts receivable, net of allowances of $206 and $218	4,471		5,015
Other current assets	162		167
Property, plant and equipment, net of accumulated depreciation of $1,147 and $1,086	201		261
Total assets held for sale	4,834		5,443
Accounts payable	2,863		3,009
Accrued liabilities	0		1
Accrued compensation	347		848
Total liabilities held for sale	3,210		3,858
Allowance for doubtful accounts	206		218
Accumulated depreciation	$ 1,147		$ 1,086
Sales | Pro Forma | Product Concentration Risk | PPT
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percent of total revenue	27.80%	42.20%