Annual report pursuant to Section 13 and 15(d)

INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS (Details)

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INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS (Details)
$ in Thousands, ر.س in Millions
3 Months Ended 12 Months Ended
Oct. 02, 2019
USD ($)
Oct. 02, 2019
SAR (ر.س)
Jun. 30, 2019
shares
Mar. 31, 2018
shares
Dec. 31, 2019
USD ($)
ر.س / $
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
Jun. 29, 2019
Mar. 30, 2018
Schedule of Equity Method Investments [Line Items]                  
Investment in AMAK (held-for-sale) (Note 6)         $ 32,872 $ 38,746      
Foreign exchange rate (SR per USD) | ر.س / $         3.75        
Results of Operations [Abstract]                  
Operating income (loss)         $ (10,863) 2,199 $ 18,275    
AMAK                  
Schedule of Equity Method Investments [Line Items]                  
Investment in AMAK (held-for-sale) (Note 6)         $ 32,872 38,700      
Amount of investment sold $ 70,000 ر.س 264.7              
Non-refundable deposit of amount sold, percentage 5.00% 5.00%              
Proceeds from sale of investment $ 3,500                
Amount of non-refundable deposit forfeited after long stop date, percentage 50.00% 50.00%              
Foreign exchange rate (SR per USD) | ر.س / $         3.75        
Results of Operations [Abstract]                  
Sales         $ 78,350 70,234 36,435    
Cost of sales         (69,620) (68,084) (43,304)    
Gross profit (loss)         8,730 2,150 (6,869)    
Selling, general and administrative         13,047 7,860 7,547    
Operating income (loss)         (4,317) (5,710) (14,416)    
Other income         558 86 238    
Finance and interest expense         (1,450) (1,592) (1,628)    
Loss before Zakat and income taxes         (5,209) (7,216) (15,806)    
Zakat and income taxes         (1,801) 487 (966)    
Net loss         (7,010) (6,729) (16,772)    
Equity Method Investment, Summarized Financial Information [Abstract]                  
Current assets         45,354 44,093      
Noncurrent assets         196,564 212,291      
Total assets         241,918 256,384      
Current liabilities         27,645 17,160      
Long term liabilities         79,348 77,366      
Shareholders' equity         134,925 161,858      
Total liabilities and equity         241,918 256,384      
Equity in Income or Loss of AMAK Reflected on Consolidated Statement Of Operation [Abstract]                  
AMAK Net Loss         (7,010) (6,729) (16,772)    
Company's share of loss reported by AMAK         (2,333) (2,248) (5,608)    
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK         1,347 1,347 1,347    
Equity in loss of AMAK         (986) $ (901) $ (4,261)    
Gain upon formation of AMAK         16,200        
Stock exchanged during period (in shares) | shares       24,489   24,489      
Return on investment         1,300        
Amount receivable for unreimbursed travel expenses         $ 30 $ 30      
AMAK | Chief Executive Officer                  
Equity in Income or Loss of AMAK Reflected on Consolidated Statement Of Operation [Abstract]                  
Share-based compensation (in shares) | shares     100,000            
Treasury Stock                  
Equity in Income or Loss of AMAK Reflected on Consolidated Statement Of Operation [Abstract]                  
Stock exchanged during period (in shares) | shares       65,000   65,000      
AMAK                  
Schedule of Equity Method Investments [Line Items]                  
Ownership percentage     33.30% 33.41% 33.30% 33.40%   33.40% 33.44%