Accounts payable and accrued expenses (Tables)

9 Months Ended

Sep. 30, 2017

Payables and Accruals [Abstract]

Components of accounts payable and accrued expenses

Accounts payable and accrued expenses are as follows:

	September 30, 2017		December 31, 2016
Outstanding checks in excess of cash	$	7,276	12,269
Accounts payable, trade	859,913		729,415
Accrued expenses	378,640		333,942
Product warranties	44,196		46,347
Accrued interest	13,346		20,396
Accrued compensation and benefits	220,866		193,213
Total accounts payable and accrued expenses	$	1,524,237	1,335,582