Trade Accounts and Bills Receivable, net

6 Months Ended

Jun. 30, 2017

Trade Accounts and Bills Receivable, net [Text Block]

3. Trade Accounts and Bills Receivable, net

Trade accounts and bills receivable as of December 31, 2016 and June 30, 2017 consisted of the following:

		December 31,			June 30,
		2016			2017
Trade accounts receivable	$	5,169,593		$	13,049,235
Less: Allowance for doubtful accounts		(2,761,144	)		(3,214,094	)
		2,408,449			9,835,141
Bills receivable		59,938			316,074
	$	2,468,387		$	10,151,215

An analysis of the allowance for doubtful accounts is as follows:

		June 30,			June 30,
		2016			2017
Balance at beginning of period	$	165,441		$	2,761,144
Provision for the period		637,034			457,946
Reversal by cash for the period		(51,066	)		(77,138	)
Charged to consolidated statements of operations and comprehensive loss		585,968			380,808
Foreign exchange adjustment		(17,317	)		72,142
Balance at end of period	$	734,092		$	3,214,094