Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 33,883	$ 12,950
Accounts receivable, net	8,904	3,429
Amounts due from related parties	382	612
Inventory	8,903	9,837
Prepaid expenses and other current assets	1,207	590
Total current assets	53,279	27,418
Property and equipment, net	3,775	3,946
Other assets	93	73
Total assets	57,147	31,437
Current liabilities:
Accounts payable	2,337	2,720
Accrued liabilities	2,127	2,254
Amounts due to related parties	3,734	1,694
Deferred income on shipments to distributors		1,720
Current portion of long-term debt	5,490	3,987
Total current liabilities	13,688	12,375
Long-term debt, net of current portion	6,772	8,178
Total liabilities	20,460	20,553
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized as of March 31, 2018 and December 31, 2017; no shares issued and outstanding as of March 31, 2018 and December 31, 2017
Common stock, $0.0001 par value per share; 100,000,000 shares authorized as of March 31, 2018 and December 31, 2017; 16,648,271 and 12,817,201 shares issued and outstanding as of March 31, 2018 and December 31, 2017	2	1
Additional paid-in capital	154,201	128,422
Accumulated deficit	(117,516)	(117,539)
Total stockholders' equity	36,687	10,884
Total liabilities and stockholders' equity	$ 57,147	$ 31,437

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.