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BUSINESS SEGMENTS (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Sales by geographical areas
Total sales	$ 6,178,576us-gaap_SalesRevenueNet	$ 6,040,378us-gaap_SalesRevenueNet
U.S
Sales by geographical areas
Total sales	5,834,591us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	4,950,177us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Long-lived assets
Long-Lived assets	10,788,549us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US		10,642,859us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
North and South America sales (excluding U.S.)
Sales by geographical areas
Total sales	132,803us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = rvp_NorthAndSouthAmericaExcludingUnitedStatesMember	836,552us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = rvp_NorthAndSouthAmericaExcludingUnitedStatesMember
Other international sales
Sales by geographical areas
Total sales	211,182us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = rvp_OtherInternationalMember	253,649us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = rvp_OtherInternationalMember
International
Long-lived assets
Long-Lived assets	$ 203,964us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = rvp_InternationalMember		$ 209,994us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = rvp_InternationalMember

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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