Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flow from operating activities:
Net loss	$ (15,757)	$ (18,161)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	253	173
Inventory provisions	278	169
Loss on disposal of fixed assets	4	12
Stock-based compensation (including allocation from Presbia Holdings in 2015)	2,171	2,306
Imputed interest expense	37
Non-cash interest expense on funding from the Parent		1
Non-cash operating expenses allocated from the Parent		183
Changes in operating assets and liabilities:
Accounts receivable	113	(91)
Inventory	(149)	(222)
Prepaid expenses and other current assets	16	(120)
Other assets	(98)	9
Accounts payable and other current liabilities	(301)	44
Income taxes payable	8	16
Deferred rent	59	(15)
Due to related parties	(37)	43
Net cash used in operating activities	(13,403)	(15,653)
Cash flow from investing activities:
Purchase of intangible assets	(665)
Purchases of property and equipment	(140)	(196)
Net cash used in investing activities	(805)	(196)
Cash flow from financing activities:
Proceeds from issuance of ordinary shares upon initial public offering, net of underwriting costs		38,750
Deferred offering costs	(167)	(2,431)
Proceeds from sale of equipment	1
Funding from the Parent		1,141
Net cash (used in) provided by financing activities	(166)	37,460
Net (decrease) increase in cash	(14,374)	21,611
Effect of exchange rate on cash	(42)
Cash balance at beginning of period	21,749	138
Cash balance at end of period	7,333	21,749
Supplemental disclosure of cash flow information:
Cash paid for income taxes	50	3
Supplemental disclosures of non-cash investing and financing activities:
Deferred offering costs included in accounts payable and other current liabilities	91
Capitalization of amounts due to Parent per 2014 and 2015 Debt Conversions		$ 1,559
Note Payable To Neoptics AG [Member]
Supplemental disclosures of non-cash investing and financing activities:
Remaining installments payable to Neoptics AG pursuant to asset purchase agreement	$ 981