Accrued Expenses and Other Current Liabilities (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Accrued expenses
Accrued stockholder interest	$ 21,017	$ 10,769
Accrued compensation	284,363	320,251
Accrued warranty	107,589	115,566	142,396	135,708
Accrued inventory purchases	63,363	81,146
Customer deposits	7,413	5,841
Deferred rent	67,168	65,380
Accrued taxes and other	118,013	124,118
Accrued expenses, Total	$ 668,926	$ 723,071