Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Schedule of Credit Losses for Financing Receivables, Current [Table Text Block]

The following is a rollforward of the Company’s allowance for doubtful accounts:

	2012			2011
Balance, beginning of period	$	169,191		$	119,295
Provision for (recoveries of) doubtful accounts		(28,866	)		49,896
Write-offs (write-backs)		(18,742	)		—
Balance, end of period	$	121,583		$	169,191