CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 72,975	$ 3,356
Short-term investments	2,500	9,175
Accounts receivable, related party	515	636
Inventory	827	363
Other current assets	1,244	273
Total current assets	78,061	13,803
Property and equipment, net	717	418
Total assets	78,778	14,221
Current liabilities:
Accounts payable and accrued expenses	595	549
Accrued compensation	2,497	1,250
Accrued clinical expenses	101	913
Other current liabilities	1,399	493
Customer deposit from related party	0	1,283
Current portion of long-term loan	0	747
Warrant liability	0	332
Total current liabilities	4,592	5,567
Long-term loan, excluding current portion	9,881	9,094
Total liabilities	14,473	14,661
Commitments and contingencies (See Note 10)
Convertible preferred stock
Convertible preferred stock	0	54,699
Stockholders’ equity (deficit):
Common stock, $0.001 par value; 300,000,000 and 35,000,000 shares authorized at December 31, 2016 and December 31, 2015, respectively; 16,773,205 and 575,126 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively	17	1
Additional paid-in capital	140,898	1,002
Accumulated other comprehensive loss	(1)	0
Accumulated deficit	(76,609)	(56,142)
Total stockholders’ equity (deficit)	64,305	(55,139)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	78,778	14,221
Series A Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	0	6,773
Series B Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	0	6,454
Series C Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	0	16,393
Series C-1 Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	0	4,984
Series D Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	0	20,095
Series E Convertible Preferred Stock
Convertible preferred stock
Convertible preferred stock	$ 0	$ 0