Fair Value of Financial Instruments (Details) $ in Thousands		12 Months Ended
	May 01, 2017 USD ($) installment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value
Financial assets measured at fair value		$ 0	$ 0
Financial liabilities measured at fair value		0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value
Financial assets measured at fair value		0	0
Financial liabilities measured at fair value		0	$ 0
Deny Designs
Fair Value
Contingent consideration	$ 2,800
Number of annual installments | installment	3
Maximum contingent consideration	$ 3,600
Fair value adjustment		300
Deny Designs | Fair Value, Inputs, Level 3
Fair Value
Contingent consideration		2,800
Deny Designs | Contingent Consideration, Payable in First Year
Fair Value
Minimum contingent consideration	300	300
Maximum contingent consideration	$ 1,200	1,200
Deny Designs | Contingent Consideration, Payable in Second Year
Fair Value
Minimum contingent consideration		300
Maximum contingent consideration		1,200
Deny Designs | Contingent Consideration, Payable in Third Year
Fair Value
Minimum contingent consideration		300
Maximum contingent consideration		$ 1,200