11. INCOME TAXES (Details-Deferred taxes) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Allowance for doubtful accounts	$ 198	$ 353
Net operating loss	5,258	4,249
Share-based compensation	1,140	990
Investment in joint venture	4,599	4,700
Other	90	122
Total deferred tax assets	11,285	10,414
Deferred tax liabilities:
Depreciation and amortization on property, plant and equipment	(2,797)	(2,360)
Amortization of intangibles	(59)	(41)
Total deferred tax liabilities	(2,856)	(2,401)
Less: valuation allowance	$ (8,429)	$ (8,013)