Debt - Additional Information (Detail) (USD $)			3 Months Ended		6 Months Ended					1 Months Ended							1 Months Ended							3 Months Ended	6 Months Ended	1 Months Ended								6 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Sep. 27, 2013	Mar. 31, 2013	Sep. 27, 2013 Bank Term Loan	Sep. 28, 2012 Bank Term Loan	Sep. 27, 2013 Bank Term Loan	Sep. 28, 2012 Bank Term Loan	Sep. 27, 2013 Silicon Valley Loan Agreement	Jan. 31, 2012 Silicon Valley Loan Agreement	Jan. 31, 2012 Silicon Valley Loan Agreement Export Import Sublimit	Jan. 31, 2012 Silicon Valley Loan Agreement Export Import Sublimit Maximum	Jan. 31, 2012 Silicon Valley Loan Agreement Export Import Sublimit Minimum	Sep. 27, 2013 Silicon Valley Loan Agreement Bank Term Loan	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan Before First Anniversary of Term Loan	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan After First but Before Second Anniversary of Term Loan	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan After Second Anniversary of Term Loan	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan Maximum	Jan. 31, 2012 Silicon Valley Loan Agreement Bank Term Loan Minimum	Jan. 31, 2012 Silicon Valley Loan Agreement Period One	Jan. 31, 2012 Silicon Valley Loan Agreement Period Two	Jan. 31, 2012 Silicon Valley Loan Agreement Period Three	Jan. 31, 2012 Silicon Valley Loan Agreement Period Four	Feb. 14, 2013 Partners for Growth III, L.P.	Sep. 27, 2013 Partners for Growth III, L.P.	Sep. 27, 2013 Partners for Growth III, L.P.	Feb. 14, 2013 Partners for Growth III, L.P. Maximum	Feb. 14, 2013 Partners for Growth III, L.P. Period Five	Feb. 14, 2013 Partners for Growth III, L.P. Period One	Feb. 14, 2013 Partners for Growth III, L.P. Period Two	Feb. 14, 2013 Partners for Growth III, L.P. Period Three	Feb. 14, 2013 Partners for Growth III, L.P. Period Four	Feb. 14, 2013 Partners for Growth III, L.P. Exercise Price 1	Feb. 14, 2013 Partners for Growth III, L.P. Exercise Price 2	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement One	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement One Subsequent Event	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement Two	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement Two Deferred Payments	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement Two Subsequent Event	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement	Sep. 28, 2012 Michigan Economic Development Corporation Loan Agreement	Sep. 27, 2013 Michigan Economic Development Corporation Loan Agreement	Sep. 28, 2012 Michigan Economic Development Corporation Loan Agreement
Debt Instrument [Line Items]
Line of Credit								$ 5,000,000	$ 3,000,000
Additional interest above prime rate										4.00%	0.50%						4.50%	1.00%
Adjusted EBITDA																			750,000	300,000	1	100,000					412,000	(750,000)	(300,000)	1	100,000
Liquidity ratio								2.25															2.25
Bank term loan	500,000	667,000											1,000,000
Loan payment period													3 years
Percentage of prepayment premium over amount outstanding														1.00%	0.50%	0.25%
Percentage of termination fee on amount outstanding													1.00%
Interest rate on loan												4.25%
Interest rate on line of credit												3.75%
Line of credit outstanding												1,251,000
Line of credit, additional borrowing capacity												2,100,000
SVB term loan expiry							2015-03
Line of credit expiry							2014-01
Interest payments during a period			25,000	14,000	36,000	30,000																		66,000	138,000														8,000	13,000	17,000	28,000
Debt instrument, interest rate																							11.75%											4.00%	5.00%	4.00%		5.00%
Debt instrument maturity date																																		Dec. 01, 2014		Oct. 01, 2014
Effective date of loans restructuring																																									Nov. 06, 2013
Unsecured Debt	654,000	930,000																																					2,200,000		2,200,000
Default rate of interest																																				15.00%
Monthly principal payments, deferred until maturity																																					46,000
Aggregate principal amount																							2,500,000
Payment of loan period																							42 months
Issuance of common stock for warrants																							1,195,000									995,000	200,000
Warrants strike price																																$ 0.50	$ 1.00
Warrant canceled																																100,000	100,000
Maximum aggregate amount that warrant holder has the right to exchange																										250,000
Consecutive trading days prior to the date of exercise																							45 days
Loan agreement, revenue requirement																											32,600,000
Debt discount																											434,000
Remaining unamortized debt discount																							$ 405,000	$ 308,000	$ 308,000