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DIVIDENDS (Details) (USD $)
 3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 24, 2015
Dividends      
Preferred dividends declared, not paid $ 170,817us-gaap_DividendsPreferredStockCash $ 57,613us-gaap_DividendsPreferredStockCash  
Series I, Class B      
Dividends      
Preferred dividends declared, not paid     37,891us-gaap_DividendsPreferredStockCash
/ us-gaap_StatementClassOfStockAxis
= rvp_SeriesOneConvertibleClassBPreferredStockMember
Series II, Class B      
Dividends      
Preferred dividends declared, not paid     $ 132,926us-gaap_DividendsPreferredStockCash
/ us-gaap_StatementClassOfStockAxis
= rvp_SeriesTwoConvertibleClassBPreferredStockMember