INVESTMENTS	9 Months Ended
Sep. 30, 2014
US SEISMIC SYSTEMS, INC. [Abstract]
Investments in and Advances to Affiliates	INVESTMENTS Investment in US Seismic Systems^®, Inc. ("USSI^®") The Company currently owns approximately 95.7% of USSI on an as converted basis (which amount would be diluted to approximately 88.4% if all options which could be awarded under USSI's 2012 Stock Purchase Plan were awarded and exercised). Through December 31, 2013, the Company invested $7,584 in USSI common shares (of which $5,355 was in cash and $2,229 was in Acorn common shares) and an additional $16,750 in USSI Preferred Stock. In addition, in 2013, the Company advanced USSI $1,355 in contemplation of a new investment agreement. During the first nine months of 2014, the Company advanced an additional $7,758 to USSI in contemplation of a new investment agreement. Loan to Channel Partner In the second quarter of 2014, the Company lent a channel partner (“CP”) active in sourcing trials for USSI’s products a total of $640 under a secured promissory note ("the Note"). The loan bears interest at 8%. CP granted the Company, as security for the loans made pursuant to the Note, a first, secured lien on all of CP's receivables from customer accounts and all intellectual property used in its business. The loan and any accrued and unpaid interest was due and payable not later than the earlier of (i) the date CP collects customer receivables in the amount of the then-outstanding principal amount, or (ii) June 30, 2014. As of the date of this filing, the loan is in default. The Company has taken a full provision on the $640 of principal as well as the $9 of interest accrued through June 30, 2014. The Company has ceased accruing interest on the Note. The Company is evaluating its options and rights under the Note and accompanying security instruments. Investment in DSIT Solutions, Ltd. ("DSIT") In July 2013, the Company entered into a Stock Purchase Agreement with DSIT (the "DSIT SPA") pursuant to which the Company converted a prior loan of approximately $800 into additional ordinary (common) shares of DSIT. The Company also converted $2,800 in advances and loans into DSIT's Participating Preferred Stock (the “DSIT Preferred Stock”). At the closing, Acorn purchased an additional $800 of DSIT Preferred Stock and committed to purchasing an additional $1,400 of DSIT Preferred Stock. The DSIT Preferred Stock provided that upon any future liquidation of DSIT, to the extent funds are available for distribution to DSIT's stockholders after the satisfaction of any DSIT liabilities at that time, DSIT would first repay the Company for the purchase price of its DSIT Preferred Stock (the “Liquidation Preference”). Thereafter, the Company would receive a further payment for such shares ratably with all other DSIT ordinary stock holders as though the Company's shares of DSIT Preferred Stock were the same number of DSIT ordinary shares. In September 2013, the Company informed DSIT that it did not plan to fund payment of the remaining $1,400 it had committed to invest in DSIT. In August 2014, the DSIT SPA was amended to release Acorn from the obligation to make the additional investment. Under the amended DSIT SPA, in consideration for amending the DSIT SPA, the Company agreed to waive the Liquidation Preference. The Company still would receive payment for such shares ratably with all other DSIT ordinary stock holders as though the Company's shares of DSIT Preferred Stock were the same number of DSIT ordinary shares. The Company currently owns approximately 88.3% of DSIT on an as converted basis. If all the options to purchase all shares of DSIT ordinary stock available under the DSIT Option Plan are granted and exercised, the Company would own approximately 77.4% of DSIT on a fully diluted as converted basis.

INVESTMENTS

Investment in US Seismic Systems^®, Inc. ("USSI^®")

The Company currently owns approximately 95.7% of USSI on an as converted basis (which amount would be diluted to approximately 88.4% if all options which could be awarded under USSI's 2012 Stock Purchase Plan were awarded and exercised). Through December 31, 2013, the Company invested $7,584 in USSI common shares (of which $5,355 was in cash and $2,229 was in Acorn common shares) and an additional $16,750 in USSI Preferred Stock. In addition, in 2013, the Company advanced USSI $1,355 in contemplation of a new investment agreement. During the first nine months of 2014, the Company advanced an additional $7,758 to USSI in contemplation of a new investment agreement.

Loan to Channel Partner

In the second quarter of 2014, the Company lent a channel partner (“CP”) active in sourcing trials for USSI’s products a total of $640 under a secured promissory note ("the Note"). The loan bears interest at 8%. CP granted the Company, as security for the loans made pursuant to the Note, a first, secured lien on all of CP's receivables from customer accounts and all intellectual property used in its business. The loan and any accrued and unpaid interest was due and payable not later than the earlier of (i) the date CP collects customer receivables in the amount of the then-outstanding principal amount, or (ii) June 30, 2014. As of the date of this filing, the loan is in default. The Company has taken a full provision on the $640 of principal as well as the $9 of interest accrued through June 30, 2014. The Company has ceased accruing interest on the Note. The Company is evaluating its options and rights under the Note and accompanying security instruments.

Investment in DSIT Solutions, Ltd. ("DSIT")

In July 2013, the Company entered into a Stock Purchase Agreement with DSIT (the "DSIT SPA") pursuant to which the Company converted a prior loan of approximately $800 into additional ordinary (common) shares of DSIT. The Company also converted $2,800 in advances and loans into DSIT's Participating Preferred Stock (the “DSIT Preferred Stock”). At the closing, Acorn purchased an additional $800 of DSIT Preferred Stock and committed to purchasing an additional $1,400 of DSIT Preferred Stock.

The DSIT Preferred Stock provided that upon any future liquidation of DSIT, to the extent funds are available for distribution to DSIT's stockholders after the satisfaction of any DSIT liabilities at that time, DSIT would first repay the Company for the purchase price of its DSIT Preferred Stock (the “Liquidation Preference”). Thereafter, the Company would receive a further payment for such shares ratably with all other DSIT ordinary stock holders as though the Company's shares of DSIT Preferred Stock were the same number of DSIT ordinary shares.

In September 2013, the Company informed DSIT that it did not plan to fund payment of the remaining $1,400 it had committed to invest in DSIT. In August 2014, the DSIT SPA was amended to release Acorn from the obligation to make the additional investment. Under the amended DSIT SPA, in consideration for amending the DSIT SPA, the Company agreed to waive the Liquidation Preference. The Company still would receive payment for such shares ratably with all other DSIT ordinary stock holders as though the Company's shares of DSIT Preferred Stock were the same number of DSIT ordinary shares.

The Company currently owns approximately 88.3% of DSIT on an as converted basis. If all the options to purchase all shares of DSIT ordinary stock available under the DSIT Option Plan are granted and exercised, the Company would own approximately 77.4% of DSIT on a fully diluted as converted basis.