CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 16,466	$ 9,949
Restricted cash	0	719
Short term investments	61,678	0
Trade accounts receivable, net of allowance of $428 and $204	5,015	4,857
Inventories, net of provision for obsolescence of $439 and $1,913	5,212	4,274
Prepaid expenses and other current assets	1,146	433
Current assets of discontinued operations	0	2,315
Total current assets	89,517	22,547
Property and equipment, net	5,788	6,033
Purchased technology and license rights, net	6	67
Goodwill	185	185
Deposits	73	92
Other assets	41	67
Non-current assets of discontinued operations	0	1,997
Total assets	95,610	30,988
Current liabilities:
Accounts payable	1,423	1,583
Accrued severance and related	727	1,242
Accrued payroll	418	447
Current portion of mortgage note payable	0	239
Accrued taxes and other liabilities	0	214
Accrued bonus	972	80
Accrued expenses	2,505	861
Accrued warranty expense	348	186
Other liabilities	1,309	100
Current liabilities of discontinued operations	0	1,021
Total current liabilities	7,702	5,973
Mortgage note payable, net of current portion	0	2,455
Note payable	140	140
Deferred tax liability	0	368
Derivative liabilities	0	20
Total liabilities	7,842	8,956
STOCKHOLDERS' EQUITY
Common stock, $0.001 par value; 75,000,000 shares authorized; 33,847,100 issued and 33,704,525 outstanding as of December 31, 2018 and 75,000,000 shares authorized; 33,021,170 issued and 32,878,091 outstanding as of December 31, 2017, respectively	34	33
Additional paid-in capital	52,221	50,495
Retained Earnings (accumulated deficit)	35,513	(28,496)
Total stockholders’ equity	87,768	22,032
Total liabilities and stockholders’ equity	$ 95,610	$ 30,988

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.