Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Inventories

Components of inventory cost include materials, labor and manufacturing overhead. Inventories consist of the following (in thousands):

	December 31,
	2017		2016
Raw materials	$	1,921	$	856
Work in process		3,299		3,806
Finished goods		1,106		959
Total	$	6,326	$	5,621

Summary of Accounts Receivable Allowance Activity

Accounts receivable allowance activity consisted of the following for the years ended December 31 (in thousands):

	2017		2016			2015
Balance at beginning of year	$	37	$	263		$	358
Additions		78		—			—
Deductions		—		(226	)		(95	)
Balance at end of year	$	115	$	37		$	263

Schedule of Useful Lives of Property and Equipment

Depreciation is computed on the straight-line basis over the estimated useful lives of the respective assets, as follows:

	Years
Machinery and equipment	3-10
Furniture and fixtures	3-5
Computer equipment and software	3-5
Buildings	Up to 39
Land	Indefinite

Schedule of Accumulated Other Comprehensive Loss

Changes to accumulated other comprehensive loss during the year ended December 31, 2017 were as follows (in thousands):

	Translation Adjustment
Balance – December 31, 2016	$	(5,028	)
Current period other comprehensive income		(1,871	)
Balance – December 31, 2017	$	(3,157	)

Schedule of Deferred Revenue Balance

The Company’s deferred revenue balance consists of the following at December 31, 2017 and 2016 (in thousands):

	As of December 31,
	2017		2016
Product revenues	$	5,888	$	4,647
Service revenues		253		385
Regional Growth Fund		—		592
Total	$	6,141	$	5,624

Schedule of Stock-Based Compensation Expense Allocation

During the years ended December 31, 2017, 2016 and 2015, the Company recorded the following stock-based compensation expense (in thousands):

	Years Ended December 31,
	2017		2016		2015
Cost of revenues	$	120	$	199	$	79
Sales and marketing		47		50		38
Research and development		16		73		1,126
General and administrative		1,286		879		507
Total stock-based compensation	$	1,469	$	1,201	$	1,750

Assumptions Used to Value Options Granted

	Years Ended December 31,
	2017		2016		2015
Risk free interest rate	1.45%-1.59%		0.85%-1.45%		0.87%-1.20%
Expected term	4.5-4.75 years		4.75 years		4.56-4.75 years
Dividend yield		—		—		—
Expected volatility	53.15%-55.20%		55.23%-79.29%		76.86%-83.09%

Calculation of Basic and Diluted (Loss) Income Per Common Share and Common Share Equivalents

The calculation of basic and diluted (loss) income per common and common equivalent share is as follows (in thousands except for per share data):

	Years Ended December 31,
	2017			2016			2015
Basic net (loss) income per common share
Net (loss) income	$	(2,060	)	$	5,951		$	(1,496	)
Add: Excess of carrying value of Series C Preferred Stock over redemption value		459			—			—
Less: Preferred stock dividends		(14	)		(28	)		(28	)
Net (loss) income applicable to common stockholders	$	(1,615	)	$	5,923		$	(1,524	)
Basic weighted average number of common shares    outstanding		10,824			10,795			10,774
Basic net (loss) income per common share	$	(0.15	)	$	0.55		$	(0.14	)
Diluted net (loss) income per common share
Net (loss) income applicable to common stock	$	(1,615	)	$	5,923		$	(1,524	)
Add: Preferred stock dividends		—			28			—
Net (loss) income applicable to dilutive common stock	$	(1,615	)	$	5,951		$	(1,524	)
Basic weighted average number of common shares    outstanding		10,824			10,795			10,774
Effect of dilutive securities
Dilutive preferred share conversions		—			83			—
Dilutive stock awards		—			13			—
		—			96			—
Diluted weighted average number of common shares    outstanding		10,824			10,891			10,774
Diluted net (loss) income per common share	$	(0.15	)	$	0.55		$	(0.14	)