Organization (Detail) (USD $)									3 Months Ended							3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Scenario, Previously Reported [Member] 6% Shareholder Note Due 2013 [Member]	Mar. 31, 2013 Scenario, Forecast [Member] 8% Shareholder Note Due 2015 [Member]	Mar. 31, 2013 Shelf Registration [Member]	May 21, 2012 Shelf Registration [Member]	Mar. 31, 2013 Minimum [Member] Purchase Agreementwith LPC [Member]	Mar. 31, 2013 Minimum [Member] 6% Shareholder Note Due 2013 [Member]	Mar. 31, 2013 Maximum [Member] Purchase Agreementwith LPC [Member]	Mar. 31, 2013 Maximum [Member] 6% Shareholder Note Due 2013 [Member]	Mar. 31, 2013 Purchase Agreementwith LPC [Member]	Oct. 13, 2011 Purchase Agreementwith LPC [Member]	Oct. 07, 2011 Purchase Agreementwith LPC [Member]	Mar. 31, 2013 Purchase At Full Capacity [Member]	Mar. 31, 2013 Purchase At Exchange Cap [Member]	Mar. 31, 2013 6% Shareholder Note Due 2013 [Member]	Jan. 30, 2013 6% Shareholder Note Due 2013 [Member]	Jul. 27, 2012 8% Shareholder Note Due 2015 [Member]	Mar. 31, 2013 Secured Demand Facility [Member]
Retained Earnings (Accumulated Deficit)	$ (176,762,000)	$ (174,621,000)
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	7,500,000																				7,500,000
Line of Credit Facility, Amount Outstanding																					5,100,000
Line of Credit Facility, Remaining Borrowing Capacity																					2,400,000
Line Of Credit Facility, Maximum Borrowing Capacity Against Inventory Collateral Percentage Of Purchased Receivables	7.50%
Stock Purchase Agreement Authorized Amount (in Dollars)								50,000,000					10,000,000		10,000,000
Sale of Stock Maximum Sale Per Transaction (in Dollars)									500,000		1,500,000
Stock Purchase Agreement Number of Shares Registered (in Shares)													1,702,836	1,823,577
Stock Purchase Agreement Exchange Cap (in Shares)													1,434,994
Stock Purchase Agreement Exchange Rate Cap													19.99%
Debt Instrument, Convertible, Conversion Price (in Dollars per share)													$ 3.014
Share Price (in Dollars per share)													$ 2.18
Assumed Proceeds From Sale Of Common Stock																3,700,000	3,100,000
Aggregate Offering Price, Common Stock							50,000,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%	8.00%														8.00%
Debt Instrument, Premium Payment										100,000		200,000
Debt Instrument, Payment Premium Converted to Fixed Amount (in Dollars)																		250,000	250,000
Debt Instrument, First Payable Amount, Conversion of Debt Premium to Fixed Amount (in Dollars)	100,000																		100,000
Cash	$ 4,583,000	$ 6,878,000	$ 4,389,000	$ 3,471,000