Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 12,950	$ 29,727
Accounts receivable, net	3,429	3,170
Amounts due from related parties	612	486
Inventory	9,837	5,069
Prepaid expenses and other current assets	590	1,050
Total current assets	27,418	39,502
Property and equipment, net	3,946	1,920
Other assets	73	50
Total assets	31,437	41,472
Current liabilities:
Accounts payable	2,720	1,502
Accrued liabilities	2,254	1,811
Amounts due to related parties	1,694	1,359
Deferred income on shipments to distributors	1,720	1,827
Current portion of long-term debt	3,987	3,884
Total current liabilities	12,375	10,383
Long-term debt, net of current portion	8,178	4,218
Total liabilities	20,553	14,601
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized as of December 31, 2017 and 2016; no shares issued and outstanding as of December 31, 2017 and 2016
Common stock, $0.0001 par value per share; 100,000,000 shares authorized as of December 31, 2017 and 2016; 12,817,201 and 12,498,128 shares issued and outstanding as of December 31, 2017 and 2016	1	1
Additional paid-in capital	128,422	123,309
Accumulated deficit	(117,539)	(96,439)
Total stockholders' equity	10,884	26,871
Total liabilities and stockholders' equity	$ 31,437	$ 41,472

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).

Name:	us-gaap_AccountsPayableCurrent
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.