Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventories [Abstract]

Components of inventories

	March 31, 2017			December 31, 2016
Raw materials	$	1,067,044		$	1,003,359
Work-in-process		1,333,873			639,345
Finished goods		415,423			772,652
		2,816,340			2,415,356
Less: reserve for obsolete inventories		(21,337	)		(21,177	)
	$	2,795,003		$	2,394,179