Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 28,513	$ 19,244
Investments	80,648	58,519
Trade accounts receivable	1,946	34
Inventory	8,063	0
Prepaid expenses	850	468
Other current assets	468	183
Total current assets	120,488	78,448
Property and equipment, net	4,890	4,258
Intellectual property, net	134	146
Total assets	125,512	82,852
Current liabilities:
Accounts payable	2,080	992
Accrued liabilities	3,636	3,009
Deferred revenue and income	1,071	35
Total current liabilities	6,787	4,036
Long-term deferred income	0	1,000
Other long term liabilities	21	0
Total liabilities	6,808	5,036
Commitments and contingencies see Note 17, Commitments and Contingencies
Stockholders' equity:
Preferred shares, $0.001 par value	0	0
Common stock, $0.001 par value	56	52
Contributed capital	360,620	255,257
Accumulated deficit	(241,972)	(177,289)
Accumulated other comprehensive income (loss)	0	(204)
Total stockholders' equity	118,704	77,816
Total liabilities and stockholders' equity	$ 125,512	$ 82,852

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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- 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).