CONDENSED CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 61,622	$ 28,513
Investments	118,982	80,648
Trade accounts receivable	1,440	1,946
Inventory	9,406	8,063
Prepaid expenses	940	850
Other current assets	494	468
Total current assets	192,884	120,488
Property and equipment, net	7,412	4,890
Intellectual property, net	119	134
Other non-current assets	241	0
Total assets	200,656	125,512
Current liabilities:
Accounts payable	1,559	2,080
Accrued liabilities	3,518	3,636
Accrued interest	191	0
Deferred revenue and income	202	1,071
Total current liabilities	5,470	6,787
Other long term liabilities	26	21
Convertible notes	117,754	0
Total liabilities	123,250	6,808
Commitments and contingencies
Stockholders’ equity:
Preferred shares	0	0
Common stock	54	56
Contributed capital	430,734	360,620
Treasury Stock	(45,067)	0
Accumulated deficit	(308,156)	(241,972)
Accumulated other comprehensive loss	(159)	0
Total stockholders’ equity	77,406	118,704
Total liabilities and stockholders’ equity	$ 200,656	$ 125,512

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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

- Definition

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).