Business Segment and Geographic Area Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Sales	$ 28,828	$ 20,917	$ 77,627	$ 61,647
Depreciation	27	18	64	70
Amortization of Other Intangible Assets	71	60	191	189
Interest Expense	25	174	84	715
Segment Profit	4,388	3,254	11,519	9,097
Segment Assets	32,129	25,879	32,129	25,879
Expenditures for Segment Assets	233	(45)	465	133
Operating Segments [Member] | Foam [Member]
Segment Reporting Information [Line Items]
Sales	24,642	17,719	66,383	52,088
Depreciation	23	15	55	59
Amortization of Other Intangible Assets	61	51	165	160
Interest Expense	21	147	72	603
Segment Profit	3,502	2,713	9,399	7,517
Segment Assets	26,830	21,315	26,830	21,315
Expenditures for Segment Assets	199	(38)	395	112
Operating Segments [Member] | Coatings [Member]
Segment Reporting Information [Line Items]
Sales	4,186	3,198	11,244	9,559
Depreciation	4	3	9	11
Amortization of Other Intangible Assets	10	9	26	29
Interest Expense	4	27	12	112
Segment Profit	886	541	2,120	1,580
Segment Assets	5,299	4,564	5,299	4,564
Expenditures for Segment Assets	$ 34	$ (7)	$ 70	$ 21