XML 45 R21.htm IDEA: XBRL DOCUMENT
v2.4.0.6

6. STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Stock-Based Compensation |
STOCK-BASED COMPENSATION |
Outstanding Options and Warrants |  |  |  |  | Weighted Average Exercise price Per Common |  |  | Weighted Average Remaining Contractual Life |  |  | Aggregate |
Under the 2006 Plan and 2000 Plan |  | Shares |  |  | Share |  |  | (in years) |  |  | Intrinsic Value |
Balance, December 31, 2012 |  |  | 6,231,250 |  |  | $ | 3.58 |  |  |  |  |  |  |  |  |
Granted |  |  | – |  |  |  | – |  |  |  |  |  |  |  |  |
Exercised |  |  | – |  |  |  | – |  |  |  |  |  |  |  |  |
Canceled or expired |  |  | (100,000 | ) |  |  | 9.23 |  |  |  |  |  |  |  |  |
Balance, March 31, 2013 |  |  | 6,131,250 |  |  |  | 3.49 |  |  |  | 1.67 |  |  | $ | 1,392,200 |
Exercisable at March 31, 2013 |  |  | 5,481,250 |  |  |  | 3.52 |  |  |  | 1.54 |  |  |  | 1,292,317 |
|  |  |  |  | Weighted Average Exercise price Per |  |  | Weighted Average Remaining Contractual Life |  |  | Aggregate |
Non-Plan Outstanding Warrants |  | Shares |  |  | Common Share |  |  | (in years) |  |  | Intrinsic Value |
Balance, December 31, 2012 |  |  | 1,502,898 |  |  | $ | 1.50 |  |  |  |  |  |  |  |  |
Granted |  |  | – |  |  |  | – |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,172,898 | ) |  |  | 1.12 |  |  |  |  |  |  |  |  |
Canceled or expired |  |  | – |  |  |  | – |  |  |  |  |  |  |  |  |
Balance, March 31, 2013 |  |  | 330,000 |  |  |  | 2.87 |  |  |  | 1.85 |  |  | $ | 36,000 |
Exercisable at March 31, 2013 |  |  | 330,000 |  |  |  | 2.87 |  |  |  | 1.85 |  |  |  | 36,000 |

X
- Details
Name: | rdnt_StockbasedCompensationAbstract
Namespace Prefix: | rdnt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration