Significant Accounting Policies (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Oct. 31, 2016

Jul. 31, 2016

Jan. 31, 2016

Dec. 28, 2015

Nov. 30, 2015

May 31, 2017

May 31, 2016

May 31, 2017

May 31, 2016

Jul. 31, 2015

Significant Accounting Policies (Textual)

License payment received

$ 3,000

Number of common stock issued ,value

$ 49,500

DIluted net loss

1,523,869

2,584,518

1,874,786

2,740,656

Stock Purchase Agreement [Member]

Significant Accounting Policies (Textual)

Number of common stock issued ,value

10,617

Issuance expenses

23

License Agreement [Member]

Significant Accounting Policies (Textual)

Aggregate license costs

$ 19,383

Number of common stock issued ,value

$ 38,883

Recognize revenue

2,479

Deferred costs

$ 16,904

$ 16,904

Second Milestone [Member]

Significant Accounting Policies (Textual)

License payment received

$ 6,500

Third Milestone [Member]

Significant Accounting Policies (Textual)

License payment received

$ 4,000

Forth milestone [Member]

Significant Accounting Policies (Textual)

License payment received

$ 4,000

HTIT [Member]

Significant Accounting Policies (Textual)

Percentages of royalties on net sales

10.00%

Aggregate license costs

$ 37,500

License costs payable

3,000

3,000

Amount paid subject to the company entering into certain agreements

8,000

8,000

Payable upon achievement of certain milestones and conditions

$ 26,500

$ 26,500

Royalty commitment description

In the event that the Company does not meet certain conditions, the Royalties rate may be reduced to a minimum of 8%. Following the final expiration of the Company’s patents covering the technology in the Territory in 2033, the Royalties rate may be reduced, under certain circumstances, to 5%.

Non-refundable amount

$ 500

Royalty term

15 Years

HTIT [Member] | Stock Purchase Agreement [Member]

Significant Accounting Policies (Textual)

Number of common stock issued

1,155,367

Number of common stock issued ,value

$ 12,000