Intangible Assets (Details) (USD $)	6 Months Ended
	Sep. 30, 2012	Mar. 31, 2012
Rotating Electrical [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	11 years
Gross Carrying Value	$ 7,274,000	$ 7,274,000
Accumulated Amortization	2,904,000	2,518,000
Rotating Electrical [Member] | Trademarks [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	9 years
Gross Carrying Value	553,000	553,000
Accumulated Amortization	299,000	262,000
Rotating Electrical [Member] | Customer Relationships [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	12 years
Gross Carrying Value	6,464,000	6,464,000
Accumulated Amortization	2,420,000	2,096,000
Rotating Electrical [Member] | Non-compete Agreements [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	4 years
Gross Carrying Value	257,000	257,000
Accumulated Amortization	185,000	160,000
Undercar Product Line [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	16 years
Gross Carrying Value	18,983,000	18,983,000
Accumulated Amortization	1,954,000	1,255,000
Undercar Product Line [Member] | Trademarks [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	20 years
Gross Carrying Value	11,159,000	11,159,000
Accumulated Amortization	779,000	500,000
Undercar Product Line [Member] | Customer Relationships [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	10 years
Gross Carrying Value	7,680,000	7,680,000
Accumulated Amortization	1,075,000	691,000
Undercar Product Line [Member] | Non-compete Agreements [Member]
Finite-lived intangible assets, net [Abstract]
Weighted Average Amortization Period	2 years
Gross Carrying Value	144,000	144,000
Accumulated Amortization	$ 100,000	$ 64,000