Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

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:

	2015		2014
Balance, beginning of period	$	95,525	$	144,921
Provision for (recoveries of) doubtful accounts		(2,966)		44,178
Write-offs		(33,875)		(93,574)
Balance, end of period	$	58,684	$	95,525