Accrued Expenses and Other Current Liabilities (Details) (USD $)	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Accrued expenses
Accrued stockholder interest	$ 16,406		$ 27,906
Accrued compensation	445,672		310,500
Accrued warranty	157,915	140,307	135,708	172,768	172,583	155,918
Accrued inventory purchases	52,038		59,577
Customer deposits	18,940		135,597
Deferred rent	63,592		25,341
Deferred revenue	290,796		260,638
Accrued taxes and other	134,351		155,671
Accrued expenses, Total	$ 1,179,710		$ 1,110,938