INVESTMENTS	6 Months Ended
Jun. 30, 2014
US SEISMIC SYSTEMS, INC. [Abstract]
Investments in and Advances to Affiliates [Text Block]	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 six months of 2014, the Company advanced an additional $4,800 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 is evaluating its options and rights under the Note and accompanying security instruments.

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 six months of 2014, the Company advanced an additional $4,800 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 is evaluating its options and rights under the Note and accompanying security instruments.