Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013 Segment	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting [Abstract]
Number of operating segments									2
Inventory [Abstract]
Prior period over which allocations of labor and variable and fixed overhead costs are determined based on average actual use of production facilities									12 months
Unallocated overhead costs excluded from calculation of finished goods cost									$ 1,561,000	$ 1,410,000	$ 1,378,000
Percentage of inventory reserve to cost if no liquidation market exists for part (in hundredths)	100.00%								100.00%
Reserve for excess and obsolete inventory	24,993,000				11,308,000				24,993,000	11,308,000
Period of normal operating cycle									1 year
Goodwill [Abstract]
Goodwill impairment									68,356,000
Goodwill	0				68,356,000				0	68,356,000
Revenue Recognition [Abstract]
Deferred remanufactured core revenue	12,014,000				9,775,000				12,014,000	9,775,000
Advertising Costs [Abstract]
Advertising expenses									1,331,000	1,678,000	368,000
Reconciliation of basic and diluted net income per share [Abstract]
Net (loss) income	(73,651,000)	935,000	(8,933,000)	(9,862,000)	(12,943,000)	(21,827,000)	(5,439,000)	(8,305,000)	(91,511,000)	(48,514,000)	12,220,000
Basic shares (in shares)									14,327,310	12,442,684	12,042,428
Effect of dilutive stock options and warrants (in shares)									0	0	291,903
Diluted shares (in shares)									14,327,310	12,442,684	12,334,331
Net (loss) income per share [Abstract]
Basic (in dollars per share)	$ (5.09)	$ 0.06	$ (0.62)	$ (0.71)	$ (1.03)	$ (1.74)	$ (0.44)	$ (0.68)	$ (6.39)	$ (3.9)	$ 1.01
Diluted (in dollars per share)	$ (5.09)	$ 0.06	$ (0.62)	$ (0.71)	$ (1.03)	$ (1.74)	$ (0.44)	$ (0.68)	$ (6.39)	$ (3.9)	$ 0.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)									635,800	15,000	18,000
Black-Scholes option pricing model assumptions used to derive the weighted average fair value of the stock options granted [Abstract]
Weighted average risk free interest rate (in hundredths)									1.17%	1.74%	2.09%
Weighted average expected holding period									6 years 7 months 6 days	6 years 3 months 15 days	5 years 8 months 23 days
Weighted average expected volatility (in hundredths)									44.25%	40.28%	38.87%
Weighted average expected dividend yield (in hundredths)									0.00%	0.00%	0.00%
Weighted average fair value of options granted (in dollars per share)									$ 2.92	$ 4.21	$ 3.82
Deferred Compensation Plan [Abstract]
Short-term investments redeemed for the payment of deferred compensation liabilities									0	0
Carrying value of plan assets	411,000				342,000				411,000	342,000
Deferred compensation obligation	411,000				342,000				411,000	342,000
Expense related to the deferred compensation plan									$ 8,000	$ 8,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)									635,800	15,000	18,000
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from effect of dilutive options and warrants (in shares)									1,549,683	1,447,284	771,084
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from effect of dilutive options and warrants (in shares)									735,484	546,283	546,283
Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price (in dollars per share)	$ 1.8				$ 1.80				$ 1.8	$ 1.80	$ 9.9
Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price (in dollars per share)	$ 15.06				$ 15.06				$ 15.06	$ 15.06	$ 15
Machinery and Equipment [Member] | Minimum [Member]
Plant and Equipment [Line Items]
Estimated service life									5 years
Machinery and Equipment [Member] | Maximum [Member]
Plant and Equipment [Line Items]
Estimated service life									10 years
Office Equipment and Fixtures [Member] | Minimum [Member]
Plant and Equipment [Line Items]
Estimated service life									3 years
Office Equipment and Fixtures [Member] | Maximum [Member]
Plant and Equipment [Line Items]
Estimated service life									10 years
Buildings [Member]
Plant and Equipment [Line Items]
Estimated service life									20 years