Segment and Geographical Information (Tables) - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2018

Mar. 31, 2017

Segment Reporting Information [Line Items]

Other Nonoperating Income (Expense)

$ 245

$ 51

Operating Income (Loss)

3,786

(8,092)

Interest expense

2,005

1,840

Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest

$ 2,026

$ (9,881)

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	March 31, 2018			December 31, 2017
Total Assets	(in thousands)
Headset	$	52,278		$	94,114
HyperSound (1)	26,756			26,787
Eliminations	(26,728		)	(26,650		)
Total	$	52,306		$	94,251

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following tables show our net revenues, operating income and total assets by our reporting segments:

	Three Months Ended
	March 31,
	2018			2017
Net Revenues	(in thousands)
Headset	$	40,868		$	14,260
HyperSound	18			92
Total	$	40,886		$	14,352
Operating Income (Loss)
Headset	$	3,797		$	(7,056	)
HyperSound	(11		)	(1,036		)
Total	$	3,786		$	(8,092	)
Interest Expense	$	2,005		$	1,840
Other non-operating expense (income), net	(245		)	(51		)
Income (loss) before income tax	$	2,026		$	(9,881	)

Schedule of total revenues based on where customers are physically located

The following table represents total net revenues based on where customers are physically located:

	Three Months Ended
	March 31,
	2018		2017
	(in thousands)
North America	$	32,984	$	11,055
United Kingdom	4,029		1,854
Europe	3,247		1,168
Other	626		275
Total net revenues	$	40,886	$	14,352