Concentrations - Concentration Risk, Customer (Details)	3 Months Ended				9 Months Ended			12 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015	Dec. 31, 2015
Percentage of revenues	10.00%		10.00%		10.00%		10.00%
Revenues [Member]
Percentage of revenues	51.00%		51.00%		46.00%		40.00%
Accounts Receivable [Member]
Percentage of revenues					58.00%			45.00%
Inventory Purchases [Member]
Percentage of revenues	48.00%		50.00%		42.00%		55.00%
Customer A [Member] | Revenues [Member]
Percentage of revenues	38.00%		34.00%		32.00%		27.00%
Customer A [Member] | Accounts Receivable [Member]
Percentage of revenues					38.00%			31.00%
Customer B [Member] | Revenues [Member]
Percentage of revenues	13.00%		17.00%		14.00%		13.00%
Customer B [Member] | Accounts Receivable [Member]
Percentage of revenues					20.00%			14.00%
Vendor A [Member] | Inventory Purchases [Member]
Percentage of revenues	36.00%		38.00%		31.00%		32.00%
Vendor B [Member] | Inventory Purchases [Member]
Percentage of revenues	12.00%		12.00%		11.00%		12.00%
Vendor C [Member] | Inventory Purchases [Member]
Percentage of revenues		[1]		[1]		[1]	11.00%

[1] less than 10%