Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net loss	$ (5,556)us-gaap_NetIncomeLoss	$ (2,797)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation	91us-gaap_ShareBasedCompensation	2us-gaap_ShareBasedCompensation
Depreciation	85	31
Accrued severance pay, net	(4)us-gaap_SeveranceCosts1	2us-gaap_SeveranceCosts1
Amortization of discount on loan	3	3
Revaluation of fair value of warrant to purchase Convertible Preferred Shares	(40)us-gaap_FairValueAdjustmentOfWarrants	(113)us-gaap_FairValueAdjustmentOfWarrants
Increase in other accounts receivable and prepaid expenses	(132)	(302)
Increase (decrease) in trade payables	(184)	469
Increase (decrease) in other accounts payable and accrued expenses	831	(179)
Net cash used in operating activities	(4,906)	(2,884)
Cash flows from investing activities
Proceeds from maturity of investment in restricted cash	176	176
Purchases of property and equipment	(204)	(93)
Investment in other assets		(6)
Net cash provided by (used in) investing activities	(28)	77
Cash flows from financing activities
Proceeds from issuance of Ordinary Shares, net of issuance costs upon IPO	36,250
Proceeds from issuance of Convertible Preferred Shares and warrants, net of issuance costs		13,584
Proceeds from issuance of Convertible Preferred Shares, net of issuance costs	11,406
Repayment of loan	(141)us-gaap_RepaymentsOfLongTermDebt	(141)us-gaap_RepaymentsOfLongTermDebt
Proceeds from exercise of options into Ordinary Shares	145
Net cash provided by financing activities	47,660	13,443
Net increase in cash and cash equivalents	42,726	10,636
Cash and cash equivalents at beginning of period	6,167	2,072
Cash and cash equivalents at end of period	48,893	12,708
Supplemental disclosure of non-cash investing and financing activities
Purchase of property and equipment	184	101
Conversion of Warrants to purchase Convertible Preferred Shares into Ordinary Shares	47,075
Conversion of Convertible Preferred Shares into Ordinary Shares	5,945
Non-cash deferred IPO costs	1,463stdy_NoncashDeferredIpoCosts
Conversion of warrants to purchase Convertible Preferred Shares into warrants to purchase Ordinary Shares	87
Cash paid during the period
Cash paid for interest	10us-gaap_InterestPaidNet	60us-gaap_InterestPaidNet
Cash paid for taxes	$ 182us-gaap_IncomeTaxesPaidNet	$ 1us-gaap_IncomeTaxesPaidNet

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Conversion of Warrants to purchase Convertible Preferred Shares into Warrants to purchase Ordinary Shares

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Non-cash deferred IPO Costs

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The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. The cash inflow from issuance of warrants and preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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-Section 50

-Paragraph 1

-Subparagraph (a)(10)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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Name:	us-gaap_ShareBasedCompensation
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- Details

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