Schedule of Royalty and Other Revenues (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total royalty and other revenue		$ 2,884	$ 2,266	$ 5,071	$ 5,002
Royalty Revenue [Member] | Bellco License Agreement [Member]
Disaggregation of Revenue [Line Items]
Total royalty and other revenue			15		29
Royalty Revenue [Member] | Camelbak Sublicense Agreement [Member]
Disaggregation of Revenue [Line Items]
Total royalty and other revenue	[1]		20		20
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Total royalty and other revenue		45	35	55	45
Royalty and Other revenues [Member]
Disaggregation of Revenue [Line Items]
Total royalty and other revenue		$ 45	$ 70	$ 55	$ 94

[1] In May 2015, the Company entered into a Sublicense Agreement (the “Sublicense Agreement”) with CamelBak Products, LLC (“CamelBak”). Under this Sublicense Agreement, the Company granted CamelBak an exclusive, non-transferable, worldwide (with the exception of Italy) sublicense and license, in each case solely to market, sell, distribute, import and export the IWTD. In exchange for the rights granted to CamelBak, CamelBak agreed, through December 31, 2022, to pay the Company a percentage of the gross profit on any sales made to a branch of the U.S. military, subject to certain exceptions, and to pay a fixed per-unit fee for any other sales made. CamelBak was also required to meet or exceed certain minimum annual fees payable to the Company, and, if such fees are not met or exceeded, the Company was able to convert the exclusive sublicense to a non-exclusive sublicense with respect to non-U.S. military sales. In the first quarter of 2019, the Sublicense Agreement was amended to eliminate the minimum fee obligations starting May 6, 2018 and, as such, CamelBak has no further minimum fee obligations.