Summary of Significant Accounting Policies (Details 1) - Sales Returns [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance at beginning of period	$ 5,457	$ 4,825
Additions that reduced net sales	34,390	33,543
Deduction from reserves for current year returns	(32,576)	(32,911)
Balance at end of period	$ 7,271	$ 5,457