Quarterly Financial Data (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Data [Abstract]
Net sales	$ 5,330,000	$ 6,074,000	$ 4,773,000	$ 3,997,000	$ 4,200,000	$ 3,060,000	$ 5,026,000	$ 4,947,000	$ 20,174,000	$ 17,233,000
Gross profit	2,348,000	2,560,000	1,494,000	900,000	674,000	170,000	1,938,000	2,036,000	7,302,000	4,818,000
Net income (loss)	$ 69,000	$ 380,000	$ (496,000)	$ (1,577,000)	$ (388,000)	$ (1,721,000)	$ (675,000)	$ 53,873,000	$ (1,624,000)	$ 51,089,000
Net income (loss) per share:
Basic	$ 0.01	$ 0.03	$ (0.04)	$ (0.12)	$ (0.03)	$ (0.11)	$ (0.04)	$ 3.37	$ (0.12)	$ 3.35
Diluted	$ 0.01	$ 0.03	$ (0.04)	$ (0.12)	$ (0.03)	$ (0.11)	$ (0.04)	$ 3.17	$ (0.12)	$ 3.29