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Significant Agreements (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 13 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 21, 2016 | Oct. 21, 2014 | Oct. 17, 2014 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019
Joint development agreement |  |  |  |  |  |  |  |  |  |
Research and development expense |  |  |  |  | $ 3,395,000 | $ 6,453,000 |  | $ 10,912,000 | $ 19,706,000 |
Non-cash compensation expense (income) |  |  |  |  |  | 247,000 |  |  | 709,000 |
Common Stock |  |  |  |  |  |  |  |  |  |
Joint development agreement |  |  |  |  |  |  |  |  |  |
Number of shares sold |  |  |  |  |  |  | 3,772,447 |  |  |
Joint Development Agreement | Global Foundries, Inc. |  |  |  |  |  |  |  |  |  |
Joint development agreement |  |  |  |  |  |  |  |  |  |
Period of possession of exclusive right to manufacture after qualification of device |  |  | 3 years |  |  |  |  |  |  |
Period of possession of exclusive right to manufacture after completion of device development work |  |  | 4 years |  |  |  |  |  |  |
Research and development expense |  |  |  |  | 415,000 | 1,600,000 |  | 1,600,000 | 5,900,000 |
Milestone revenue |  |  |  |  |  | $ 300,000 |  | 0 | $ 800,000 |
Period to Repurchase Shares |  | 1 year |  |  |  |  |  |  |  |
Joint Development Agreement | Global Foundries, Inc. | Common Stock |  |  |  |  |  |  |  |  |  |
Joint development agreement |  |  |  |  |  |  |  |  |  |
Number of shares sold |  | 461,538 |  |  |  |  |  |  |  |
Shares sold, price per share |  | $ 0.00026 |  |  |  |  |  |  |  |
Number of shares of common stock, vested | 211,538 |  |  |  |  |  |  |  |  |
Joint Development Agreement | Global Foundries, Inc. | Series B Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Joint development agreement |  |  |  |  |  |  |  |  |  |
Number of shares sold |  | 192,307 |  |  |  |  |  |  |  |
Shares sold, price per share |  | $ 26.00 |  |  |  |  |  |  |  |
Collaborative Agreement | Silterra |  |  |  |  |  |  |  |  |  |
Joint development agreement |  |  |  |  |  |  |  |  |  |
Non-recurring engineering cost obligation |  |  |  | $ 1,000,000 |  |  |  |  |  |
JCA costs |  |  |  |  | $ 0 |  |  | $ 0 |  | $ 400,000

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- Definition Represents the period during which the related party possess the exclusive right to manufacture the Company's discrete and embedded ST-MRAM devices developed pursuant to the agreement, after the completion of the relevant statement of work under which the device was developed. + References No definition available. + Details
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- Definition Represents the period during which the related party possess the exclusive right to manufacture the Company's discrete and embedded ST-MRAM devices developed pursuant to the agreement, after the qualification of the MRAM device for a particular technology node. + References No definition available. + Details
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