SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Inventory [Abstract]
Total inventory	$ 2,219,000	$ 1,770,000
Finished goods	1,000,000	980,000
Raw materials	1,200,000	790,000
Intangible Assets [Abstract]
Intangible assets description	Intangible assets consist of, (i) permit costs related to the Company's treatment facility in Carthage, Texas, (ii) seven patents (two acquired in June 1998, one in November 2003, one in January 2012, two in April 2012 and one in August 2012), and (iii) defense costs related to certain existing patents.
Estimated life of patents	17 years
Amortization expense	30,000	31,000	28,000
Future amortization of intangible assets [Abstract]
2013	29,000
2014	34,000
2015	34,000
2016	34,000
2017	32,000
Thereafter	301,000
Total	464,000
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	786,000	871,000	980,000
Share-based compensation, excess tax benefits	85,000	979,000	1,089,000
Valuation assumptions [Abstract]
Weighted average risk-free interest rate	0.30%	0.70%	0.90%
Weighted average expected volatility	66.00%	67.00%	68.00%
Weighted average expected life (in years)	3 years 10 months 20 days	4 years 4 months 24 days	3 years 6 months 18 days
Dividend yield	0.00%	0.00%	0.00%
Advertising Costs [Abstract]
Advertising costs	578,000	510,000	365,000
Realization of Long-lived Assets [Abstract]
Impairment losses recognized	70,000	0	0
Employee Benefit Plans
Employers match percentage (in hundredths)	25.00%
Maximum annual percentage contribution per employee (in hundredths)	6.00%
Company contributions to the 401(k) plan	38,000	41,000	31,000
Prior Group health benefit plan, individual deductible	1,000
Group health benefit plan, family deductible	3,000
Group health benefit plan, third party insurance company coverage beginning amount, individual	11,000
Group health benefit plan, third party insurance company coverage beginning amount, family	33,000
Prior Group health benefit plan, individual deductible	1,000
Prior group health benefit plan, family deductible	2,000
Prior group health benefit plan, third party insurance company coverage beginning amount, individual	5,000
Prior group health benefit plan, third party insurance company coverage beginning amount, family	10,000
Self-insured liability, health insurance	18,000	12,000
Uncertain tax positions
Liability for uncertain tax positions	0	0
Tax adjustments	0
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Open tax years	Fiscal years ended June 30, 2009, 2010, 2011 and 2012
State of Texas [Member]
Income Tax Contingency [Line Items]
Open tax years	Fiscal years ended June 30, 2007, 2008, 2009, 2010, 2011 and 2012
State of Georgia [Member]
Income Tax Contingency [Line Items]
Open tax years	Fiscal years ended June 30, 2009, 2010, 2011 and 2012
Cost of Revenues [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	68,000	67,000	52,000
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 718,000	$ 804,000	$ 928,000