Related Party Convertible Notes	9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]
Related Party Convertible Notes	10. Related Party Convertible Notes 2017 Convertible Note Financing On June 15, 2017, the Company entered into a Note Purchase Agreement by and between the Company, as borrower, and Crystal Amber Fund Limited, as purchaser (the “Purchaser”). Pursuant to the Note Purchase Agreement, the Company issued and sold to the Purchaser a Senior Secured Convertible Promissory Note in an aggregate original principal amount of $5.0 million (the “2017 Note”). The Purchaser is a related party and is the Company’s largest shareholder. The 2017 Note accrues interest at a rate equal to 5% per annum, compounded annually, other than during the continuance of an event of default, when the 2017 Note accrues interest at a rate of 8% per annum. The entire outstanding principal balance and all unpaid accrued interest thereon is due on the maturity date, December 31, 2018. The 2017 Note is secured by a first priority security interest in substantially all personal property assets of the Company, including intellectual property. The entire outstanding principal balance under the 2017 Note and all unpaid accrued interest thereon is convertible into CHESS Depositary Interests (“CDIs”), each representing 1/50th of a share of the Company’s common stock, (i) at the option of the Purchaser at a conversion price calculated based on the five-day volume weighted average closing price of the Company’s CDIs on the ASX (“Optional Conversion Price”), or (ii) automatically upon the occurrence of an equity financing in which the Company raises at least $10 million (a “Qualified Financing”) at the price per CDI of the CDIs issued and sold in such financing. In the event that the Borrower issues additional CDIs in a subsequent equity financing at a price per CDI that is less than the then-effective optional conversion price (based on the five-day volume weighted average price on the ASX), the Purchaser has a 30-day option to convert at an adjusted conversion price reflecting, on a weighted average basis, the lower price per CDI. The number of CDIs that the Purchaser may acquire upon conversion of the 2017 Note at this adjusted conversion price is limited to the number that maintains the Purchaser’s fully-diluted ownership percentage of the Company at the same level as existed immediately preceding the applicable subsequent equity financing. In addition, upon a change of control of the Company (other than a change of control resulting from a Qualified Financing) in which the Company’s stockholders receive cash consideration, the Company is obligated to prepay all accrued and unpaid interest plus 110% of the remaining outstanding unconverted principal balance. If the consideration received for such change of control is a non-cash consideration, the Purchaser may convert the entire outstanding principal balance under the 2017 Note and all unpaid accrued interest thereon into CDIs at the abovementioned Optional Conversion Price. Other than as described above, the Company may not prepay the 2017 Note without the consent of the Purchaser. The 2017 Note Purchase Agreement contains customary events of default including a failure to perform obligations under the 2017 Note Purchase Agreement, bankruptcy, a decision by the board of directors of the Company to wind up the Company, or if the Company otherwise ceases to carry on its ongoing business operations. If a default occurs and is not cured within the applicable cure period or is not waived, any outstanding obligations under the 2017 Note may be accelerated. The 2017 Note Purchase Agreement and related 2017 Note documents also contain additional representations and warranties, covenants and conditions, in each case customary for transactions of this type. The Company recorded the $5 million 2017 Note, net of debt issuance costs of $115 thousand and will amortize the debt issuance costs over the life of the 2017 Note. For the three and nine months ended September 30, 2018, the Company recognized interest expense of $67 thousand and $191 thousand and amortization of debt issuance costs of $19 thousand and $56 thousand, respectively, related to the 2017 Note. Due to the timing of the finalization of the 2017 Note financing in 2017, the 2017 Note was issued without stockholder approval. As a consequence, while the 2017 Note contains conversion provisions, the Purchaser had, for a period of time, no right to exercise those rights until such rights of exercise were approved by the stockholders of the Company. Stockholder approval of the Purchaser’s right to convert the 2017 Note was obtained at the Company’s Annual Meeting on May 24, 2018. As of the date of this report, the 2017 Note has not been converted by the Purchaser. 2018 Convertible Note and Warrant Financing On May 30, 2018, the Company entered into a Note Purchase Agreement by and between the Company, as borrower, and Crystal Amber Fund Limited, as purchaser (the “Purchaser”). Pursuant to the Note Purchase Agreement, the Company issued and sold to the Purchaser a Senior Unsecured Convertible Promissory Note in an aggregate original principal amount of $1.75 million (the “2018 Note”). The Purchaser is a related party and is the Company’s largest shareholder. The 2018 Note accrues interest at a rate equal to 10% per annum, compounded annually, other than during the continuance of an event of default, when the 2018 Note accrues interest at a rate of 16% per annum. The entire outstanding principal balance and all unpaid accrued interest thereon is due on the maturity date, May 30, 2023. The entire outstanding principal balance under the 2018 Note and all unpaid accrued interest thereon is convertible into CHESS Depositary Interests (“CDIs”), each representing 1/50th of a share of the Company’s common stock, at the option of the Purchaser at a conversion price of $0.018 per CDI. In the event that the Borrower issues additional CDIs in a subsequent equity financing at a price per CDI that is less than $0.018 the conversion price of the 2018 Note will adjust to the lower CDI conversion price. In addition, upon a change of control of the Company, the Purchaser may demand prepayment of accrued and unpaid interest plus 110% of the remaining outstanding unconverted principal balance of the 2018 Note. The 2018 Note contains customary events of default including a failure to perform obligations under the 2018 Note Purchase Agreement, bankruptcy, a decision by the board of directors of the Company to wind up the Company, or if the Company otherwise ceases to carry on its ongoing business operations. If a default occurs and is not cured within the applicable cure period or is not waived, any outstanding obligations under the 2018 Note may be accelerated. The 2018 Note Purchase Agreement and related 2018 Note documents also contain additional representations and warranties, covenants and conditions, in each case customary for transactions of this type. In connection with the issuance of the 2018 Note, the Company also issued to the Purchaser a warrant to purchase 97,222,200 CDIs at an initial exercise price of $0.018 per CDI, subject to adjustment as described in the warrant, which warrant expires on May 30, 2023 (the “2018 Warrant”). The 2018 Warrant may be exercised at any time on a cash or cashless basis. The 2018 Warrant includes a price protection clause. If the Company issues securities in a subsequent financing at a per CDI price of less than $0.018, the exercise price of the 2018 Warrant will be reduced to the lowest such price per CDI (or the equivalent for shares of common stock) at which the newly issued securities were sold. The Company has evaluated the guidance ASC 480-10 Distinguishing Liabilities from Equity, ASC 815-40 Contracts in an Entity's Own Equity and ASC 470-20 Debt with Conversion and Other Options to determine the appropriate classification of the 2018 Note and 2018 Warrant. The 2018 Warrant was determined to be a freestanding instrument meeting the requirements for equity classification. Accordingly, the relative fair value estimated for the 2018 Warrant, totaling approximately $743 thousand, has been recorded as a discount to the debt with the offset to additional paid in capital. The 2018 Note was also evaluated for beneficial conversion feature ("BCF") subsequent to the allocation of proceeds among the 2018 Note and 2018 Warrant. Based upon the effective conversion price of the 2018 Note after considering the stock price at the date of issuance and the allocation of estimated fair value to the 2018 Warrant, it was determined that the 2018 Note contained a BCF. The value of the BCF was computed to be approximately $1.2 million but has been capped at approximately $1.0 million so as to not exceed the total proceeds from the 2018 Note after deducting the value allocated to the 2018 Note and 2018 Warrant. The effective interest rate on the note after the discounts is 26.4%, respectively. The Company recorded the 2018 Note, net of the total debt discount of $1.75 million and will amortize the debt discount over the life of the 2018 Note. For the three and nine months ended September 30, 2018, the Company recognized interest expense of $44 thousand and $58 thousand and amortization of the debt discount of $70 thousand and $95 thousand, respectively. For the three and nine months ended September 30, 2018, the Company recognized interest expense derived from issuance costs of $0 and $85 thousand, respectively.

10. Related Party Convertible Notes

2017 Convertible Note Financing

On June 15, 2017, the Company entered into a Note Purchase Agreement by and between the Company, as borrower, and Crystal Amber Fund Limited, as purchaser (the “Purchaser”). Pursuant to the Note Purchase Agreement, the Company issued and sold to the Purchaser a Senior Secured Convertible Promissory Note in an aggregate original principal amount of $5.0 million (the “2017 Note”). The Purchaser is a related party and is the Company’s largest shareholder.

The 2017 Note accrues interest at a rate equal to 5% per annum, compounded annually, other than during the continuance of an event of default, when the 2017 Note accrues interest at a rate of 8% per annum. The entire outstanding principal balance and all unpaid accrued interest thereon is due on the maturity date, December 31, 2018. The 2017 Note is secured by a first priority security interest in substantially all personal property assets of the Company, including intellectual property.

The entire outstanding principal balance under the 2017 Note and all unpaid accrued interest thereon is convertible into CHESS Depositary Interests (“CDIs”), each representing 1/50th of a share of the Company’s common stock, (i) at the option of the Purchaser at a conversion price calculated based on the five-day volume weighted average closing price of the Company’s CDIs on the ASX (“Optional Conversion Price”), or (ii) automatically upon the occurrence of an equity financing in which the Company raises at least $10 million (a “Qualified Financing”) at the price per CDI of the CDIs issued and sold in such financing.

In the event that the Borrower issues additional CDIs in a subsequent equity financing at a price per CDI that is less than the then-effective optional conversion price (based on the five-day volume weighted average price on the ASX), the Purchaser has a 30-day option to convert at an adjusted conversion price reflecting, on a weighted average basis, the lower price per CDI. The number of CDIs that the Purchaser may acquire upon conversion of the 2017 Note at this adjusted conversion price is limited to the number that maintains the Purchaser’s fully-diluted ownership percentage of the Company at the same level as existed immediately preceding the applicable subsequent equity financing.

In addition, upon a change of control of the Company (other than a change of control resulting from a Qualified Financing) in which the Company’s stockholders receive cash consideration, the Company is obligated to prepay all accrued and unpaid interest plus 110% of the remaining outstanding unconverted principal balance. If the consideration received for such change of control is a non-cash consideration, the Purchaser may convert the entire outstanding principal balance under the 2017 Note and all unpaid accrued interest thereon into CDIs at the abovementioned Optional Conversion Price. Other than as described above, the Company may not prepay the 2017 Note without the consent of the Purchaser.

The 2017 Note Purchase Agreement contains customary events of default including a failure to perform obligations under the 2017 Note Purchase Agreement, bankruptcy, a decision by the board of directors of the Company to wind up the Company, or if the Company otherwise ceases to carry on its ongoing business operations. If a default occurs and is not cured within the applicable cure period or is not waived, any outstanding obligations under the 2017 Note may be accelerated. The 2017 Note Purchase Agreement and related 2017 Note documents also contain additional representations and warranties, covenants and conditions, in each case customary for transactions of this type.

The Company recorded the $5 million 2017 Note, net of debt issuance costs of $115 thousand and will amortize the debt issuance costs over the life of the 2017 Note. For the three and nine months ended September 30, 2018, the Company recognized interest expense of $67 thousand and $191 thousand and amortization of debt issuance costs of $19 thousand and $56 thousand, respectively, related to the 2017 Note.

Due to the timing of the finalization of the 2017 Note financing in 2017, the 2017 Note was issued without stockholder approval. As a consequence, while the 2017 Note contains conversion provisions, the Purchaser had, for a period of time, no right to exercise those rights until such rights of exercise were approved by the stockholders of the Company. Stockholder approval of the Purchaser’s right to convert the 2017 Note was obtained at the Company’s Annual Meeting on May 24, 2018. As of the date of this report, the 2017 Note has not been converted by the Purchaser.

2018 Convertible Note and Warrant Financing

On May 30, 2018, the Company entered into a Note Purchase Agreement by and between the Company, as borrower, and Crystal Amber Fund Limited, as purchaser (the “Purchaser”). Pursuant to the Note Purchase Agreement, the Company issued and sold to the Purchaser a Senior Unsecured Convertible Promissory Note in an aggregate original principal amount of $1.75 million (the “2018 Note”). The Purchaser is a related party and is the Company’s largest shareholder.

The 2018 Note accrues interest at a rate equal to 10% per annum, compounded annually, other than during the continuance of an event of default, when the 2018 Note accrues interest at a rate of 16% per annum. The entire outstanding principal balance and all unpaid accrued interest thereon is due on the maturity date, May 30, 2023.

The entire outstanding principal balance under the 2018 Note and all unpaid accrued interest thereon is convertible into CHESS Depositary Interests (“CDIs”), each representing 1/50th of a share of the Company’s common stock, at the option of the Purchaser at a conversion price of $0.018 per CDI. In the event that the Borrower issues additional CDIs in a subsequent equity financing at a price per CDI that is less than $0.018 the conversion price of the 2018 Note will adjust to the lower CDI conversion price. In addition, upon a change of control of the Company, the Purchaser may demand prepayment of accrued and unpaid interest plus 110% of the remaining outstanding unconverted principal balance of the 2018 Note.

The 2018 Note contains customary events of default including a failure to perform obligations under the 2018 Note Purchase Agreement, bankruptcy, a decision by the board of directors of the Company to wind up the Company, or if the Company otherwise ceases to carry on its ongoing business operations. If a default occurs and is not cured within the applicable cure period or is not waived, any outstanding obligations under the 2018 Note may be accelerated. The 2018 Note Purchase Agreement and related 2018 Note documents also contain additional representations and warranties, covenants and conditions, in each case customary for transactions of this type.

In connection with the issuance of the 2018 Note, the Company also issued to the Purchaser a warrant to purchase 97,222,200 CDIs at an initial exercise price of $0.018 per CDI, subject to adjustment as described in the warrant, which warrant expires on May 30, 2023 (the “2018 Warrant”). The 2018 Warrant may be exercised at any time on a cash or cashless basis. The 2018 Warrant includes a price protection clause. If the Company issues securities in a subsequent financing at a per CDI price of less than $0.018, the exercise price of the 2018 Warrant will be reduced to the lowest such price per CDI (or the equivalent for shares of common stock) at which the newly issued securities were sold.

The Company has evaluated the guidance ASC 480-10 Distinguishing Liabilities from Equity, ASC 815-40 Contracts in an Entity's Own Equity and ASC 470-20 Debt with Conversion and Other Options to determine the appropriate classification of the 2018 Note and 2018 Warrant. The 2018 Warrant was determined to be a freestanding instrument meeting the requirements for equity classification. Accordingly, the relative fair value estimated for the 2018 Warrant, totaling approximately $743 thousand, has been recorded as a discount to the debt with the offset to additional paid in capital. The 2018 Note was also evaluated for beneficial conversion feature ("BCF") subsequent to the allocation of proceeds among the 2018 Note and 2018 Warrant. Based upon the effective conversion price of the 2018 Note after considering the stock price at the date of issuance and the allocation of estimated fair value to the 2018 Warrant, it was determined that the 2018 Note contained a BCF. The value of the BCF was computed to be approximately $1.2 million but has been capped at approximately $1.0 million so as to not exceed the total proceeds from the 2018 Note after deducting the value allocated to the 2018 Note and 2018 Warrant. The effective interest rate on the note after the discounts is 26.4%, respectively.

The Company recorded the 2018 Note, net of the total debt discount of $1.75 million and will amortize the debt discount over the life of the 2018 Note. For the three and nine months ended September 30, 2018, the Company recognized interest expense of $44 thousand and $58 thousand and amortization of the debt discount of $70 thousand and $95 thousand, respectively. For the three and nine months ended September 30, 2018, the Company recognized interest expense derived from issuance costs of $0 and $85 thousand, respectively.