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Segment Information (Contributions of Profitability Information For Reportable Segments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	$ 44,568	$ 38,077	$ 40,932
Loss before income taxes	(4,776)	(2,601)	(6,866)
Metallic Parts [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales		1
Loss before income taxes		(348)	(411)
Electronic Products [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	24,847	18,409	21,684
Loss before income taxes	(2,105)	(1,912)	(1,938)
Segment Total [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	45,028	38,616	41,602
Injection Molded Plastic Parts [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	20,181	20,206	19,918
Loss before income taxes	(2,671)	(341)	(4,517)
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	(460)	(539)	670
Intersegment Eliminations [Member] | Metallic Parts [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales
Intersegment Eliminations [Member] | Electronic Products [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	(104)	(105)	90
Intersegment Eliminations [Member] | Injection Molded Plastic Parts [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net sales	$ (356)	$ (434)	$ 580

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- Definition

This element represents the income or loss from continuing and discontinued operations attributable to the economic entity which may also be defined as revenue less expenses from continuing and discontinued operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts, including revenue from both continuing and discontinued operations.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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